Pyroscope: Improve label suggestions in query editor (grafana#78861)

* Send sanitized selectors to the Pyroscope backend for LabelNames and LabelValues

* Clean LabelNames response to remove already used labels

* Improve performance after major changes

* Fix import order

* Further improve rendering performance

* Fix frontend tests

* Fix fake pyroscope client signature

* Bump pyroscope/api dependency to include start/end in LabelNames/LabelValues

* Fix issue with old queries running when using the run button

* Add generated file

* Make code more readable, add a few comments

* Format with prettier

* Fix error when assigning data

* Revert "Add generated file"

This reverts commit c4f3372.

* Remove leftover code

* Simplify query editor internal state objects

* Move label selector validation up, improve label filtering

* Simplify query editor state, switch to debounce to reduce rerenders

* Revert cosmetic change

go.mod

@@ -91,7 +91,7 @@ require (
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/prometheus/alertmanager v0.25.0 // @grafana/alerting-squad-backend
 	github.com/prometheus/client_golang v1.17.0 // @grafana/alerting-squad-backend
-	github.com/prometheus/client_model v0.4.1-0.20230718164431-9a2bf3000d16 // @grafana/backend-platform
+	github.com/prometheus/client_model v0.5.0 // @grafana/backend-platform
 	github.com/prometheus/common v0.45.0 // @grafana/alerting-squad-backend
 	github.com/prometheus/prometheus v1.8.2-0.20221021121301-51a44e6657c3 // @grafana/alerting-squad-backend
 	github.com/robfig/cron/v3 v3.0.1 // @grafana/backend-platform
@@ -222,7 +222,7 @@ require (
 	golang.org/x/text v0.14.0 // @grafana/backend-platform
 	golang.org/x/xerrors v0.0.0-20220907171357-04be3eba64a2 // indirect
 	google.golang.org/appengine v1.6.7 // indirect
-	google.golang.org/genproto v0.0.0-20231002182017-d307bd883b97 // indirect; @grafana/backend-platform
+	google.golang.org/genproto v0.0.0-20231012201019-e917dd12ba7a // indirect; @grafana/backend-platform
 )
 
 require (
@@ -290,7 +290,7 @@ require (
 
 require github.com/grafana/gofpdf v0.0.0-20231002120153-857cc45be447 // @grafana/sharing-squad
 
-require github.com/grafana/pyroscope/api v0.2.1 // @grafana/observability-traces-and-profiling
+require github.com/grafana/pyroscope/api v0.3.0 // @grafana/observability-traces-and-profiling
 
 require github.com/apache/arrow/go/v13 v13.0.0 // @grafana/observability-metrics
 
@@ -409,7 +409,7 @@ require (
 	go.uber.org/zap v1.24.0 // indirect
 	golang.org/x/term v0.15.0 // indirect
 	google.golang.org/genproto/googleapis/api v0.0.0-20231002182017-d307bd883b97 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20231012201019-e917dd12ba7a // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20231016165738-49dd2c1f3d0b // indirect
 	gopkg.in/fsnotify/fsnotify.v1 v1.4.7 // indirect
 	gopkg.in/inf.v0 v0.9.1 // indirect
 	gopkg.in/natefinch/lumberjack.v2 v2.2.1 // indirect

go.sum

@@ -1820,8 +1820,8 @@ github.com/grafana/kindsys v0.0.0-20230508162304-452481b63482 h1:1YNoeIhii4UIIQp
 github.com/grafana/kindsys v0.0.0-20230508162304-452481b63482/go.mod h1:GNcfpy5+SY6RVbNGQW264gC0r336Dm+0zgQ5vt6+M8Y=
 github.com/grafana/prometheus-alertmanager v0.25.1-0.20231027171310-70c52bf65758 h1:ATUhvJSJwzdzhnmzUI92fxVFqyqmcnzJ47wtHTK3LW4=
 github.com/grafana/prometheus-alertmanager v0.25.1-0.20231027171310-70c52bf65758/go.mod h1:MmLemcsGjpbOwEeT3k7K+gnvIImXgkatCfVX6sOtx80=
-github.com/grafana/pyroscope/api v0.2.1 h1:V/GSrwSN5HgA4Ijf/2SN9Sib55E/xObswaCMkdOOsxs=
-github.com/grafana/pyroscope/api v0.2.1/go.mod h1:vNO/Rym3pwNIN4y/f0ACrk5iR7DdWlsdfZGSZE+XChU=
+github.com/grafana/pyroscope/api v0.3.0 h1:WcVKNZ8JlriJnD28wTkZray0wGo8dGkizSJXnbG7Gd8=
+github.com/grafana/pyroscope/api v0.3.0/go.mod h1:JggA80ToAAUACYGfwL49XoFk5aN5ecHp4pNIZhlk9Uc=
 github.com/grafana/regexp v0.0.0-20221122212121-6b5c0a4cb7fd/go.mod h1:M5qHK+eWfAv8VR/265dIuEpL3fNfeC21tXXp9itM24A=
 github.com/grafana/regexp v0.0.0-20221123153739-15dc172cd2db h1:7aN5cccjIqCLTzedH7MZzRZt5/lsAHch6Z3L2ZGn5FA=
 github.com/grafana/regexp v0.0.0-20221123153739-15dc172cd2db/go.mod h1:M5qHK+eWfAv8VR/265dIuEpL3fNfeC21tXXp9itM24A=
@@ -2557,8 +2557,9 @@ github.com/prometheus/client_model v0.1.0/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6T
 github.com/prometheus/client_model v0.2.0/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
 github.com/prometheus/client_model v0.3.0/go.mod h1:LDGWKZIo7rky3hgvBe+caln+Dr3dPggB5dvjtD7w9+w=
 github.com/prometheus/client_model v0.4.0/go.mod h1:oMQmHW1/JoDwqLtg57MGgP/Fb1CJEYF2imWWhWtMkYU=
-github.com/prometheus/client_model v0.4.1-0.20230718164431-9a2bf3000d16 h1:v7DLqVdK4VrYkVD5diGdl4sxJurKJEMnODWRJlxV9oM=
 github.com/prometheus/client_model v0.4.1-0.20230718164431-9a2bf3000d16/go.mod h1:oMQmHW1/JoDwqLtg57MGgP/Fb1CJEYF2imWWhWtMkYU=
+github.com/prometheus/client_model v0.5.0 h1:VQw1hfvPvk3Uv6Qf29VrPF32JB6rtbgI6cYPYQjL0Qw=
+github.com/prometheus/client_model v0.5.0/go.mod h1:dTiFglRmd66nLR9Pv9f0mZi7B7fk5Pm3gvsjB5tr+kI=
 github.com/prometheus/common v0.0.0-20181113130724-41aa239b4cce/go.mod h1:daVV7qP5qjZbuso7PdcryaAu0sAZbrN9i7WWcTMWvro=
 github.com/prometheus/common v0.0.0-20181126121408-4724e9255275/go.mod h1:daVV7qP5qjZbuso7PdcryaAu0sAZbrN9i7WWcTMWvro=
 github.com/prometheus/common v0.2.0/go.mod h1:TNfzLD0ON7rHzMJeJkieUDPYmFC7Snx/y86RQel1bk4=
@@ -3970,12 +3971,12 @@ google.golang.org/genproto v0.0.0-20230216225411-c8e22ba71e44/go.mod h1:8B0gmkoR
 google.golang.org/genproto v0.0.0-20230222225845-10f96fb3dbec/go.mod h1:3Dl5ZL0q0isWJt+FVcfpQyirqemEuLAK/iFvg1UP1Hw=
 google.golang.org/genproto v0.0.0-20230223222841-637eb2293923/go.mod h1:3Dl5ZL0q0isWJt+FVcfpQyirqemEuLAK/iFvg1UP1Hw=
 google.golang.org/genproto v0.0.0-20230306155012-7f2fa6fef1f4/go.mod h1:NWraEVixdDnqcqQ30jipen1STv2r/n24Wb7twVTGR4s=
-google.golang.org/genproto v0.0.0-20231002182017-d307bd883b97 h1:SeZZZx0cP0fqUyA+oRzP9k7cSwJlvDFiROO72uwD6i0=
-google.golang.org/genproto v0.0.0-20231002182017-d307bd883b97/go.mod h1:t1VqOqqvce95G3hIDCT5FeO3YUc6Q4Oe24L/+rNMxRk=
+google.golang.org/genproto v0.0.0-20231012201019-e917dd12ba7a h1:fwgW9j3vHirt4ObdHoYNwuO24BEZjSzbh+zPaNWoiY8=
+google.golang.org/genproto v0.0.0-20231012201019-e917dd12ba7a/go.mod h1:EMfReVxb80Dq1hhioy0sOsY9jCE46YDgHlJ7fWVUWRE=
 google.golang.org/genproto/googleapis/api v0.0.0-20231002182017-d307bd883b97 h1:W18sezcAYs+3tDZX4F80yctqa12jcP1PUS2gQu1zTPU=
 google.golang.org/genproto/googleapis/api v0.0.0-20231002182017-d307bd883b97/go.mod h1:iargEX0SFPm3xcfMI0d1domjg0ZF4Aa0p2awqyxhvF0=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20231012201019-e917dd12ba7a h1:a2MQQVoTo96JC9PMGtGBymLp7+/RzpFc2yX/9WfFg1c=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20231012201019-e917dd12ba7a/go.mod h1:4cYg8o5yUbm77w8ZX00LhMVNl/YVBFJRYWDc0uYWMs0=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20231016165738-49dd2c1f3d0b h1:ZlWIi1wSK56/8hn4QcBp/j9M7Gt3U/3hZw3mC7vDICo=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20231016165738-49dd2c1f3d0b/go.mod h1:swOH3j0KzcDDgGUWr+SNpyTen5YrXjS3eyPzFYKc6lc=
 google.golang.org/grpc v1.8.0/go.mod h1:yo6s7OP7yaDglbqo1J04qKzAhqBH6lvTonzMVmEdcZw=
 google.golang.org/grpc v1.12.0/go.mod h1:yo6s7OP7yaDglbqo1J04qKzAhqBH6lvTonzMVmEdcZw=
 google.golang.org/grpc v1.17.0/go.mod h1:6QZJwpn2B+Zp71q/5VxRsJ6NXXVCE5NRUHRo+f3cWCs=

pkg/tsdb/grafana-pyroscope-datasource/instance.go

@@ -6,6 +6,8 @@ import (
 	"fmt"
 	"net/http"
 	"net/url"
+	"slices"
+	"strconv"
 	"time"
 
 	"github.com/grafana/grafana-plugin-sdk-go/backend"
@@ -14,6 +16,8 @@ import (
 	"github.com/grafana/grafana-plugin-sdk-go/data"
 	"github.com/grafana/grafana/pkg/infra/httpclient"
 	"github.com/grafana/grafana/pkg/services/accesscontrol"
+	"github.com/prometheus/prometheus/model/labels"
+	"github.com/prometheus/prometheus/promql/parser"
 	"go.opentelemetry.io/otel/attribute"
 	"go.opentelemetry.io/otel/trace"
 )
@@ -27,8 +31,8 @@ var (
 
 type ProfilingClient interface {
 	ProfileTypes(context.Context) ([]*ProfileType, error)
-	LabelNames(ctx context.Context) ([]string, error)
-	LabelValues(ctx context.Context, label string) ([]string, error)
+	LabelNames(ctx context.Context, labelSelector string, start int64, end int64) ([]string, error)
+	LabelValues(ctx context.Context, label string, labelSelector string, start int64, end int64) ([]string, error)
 	GetSeries(ctx context.Context, profileTypeID string, labelSelector string, start int64, end int64, groupBy []string, step float64) (*SeriesResponse, error)
 	GetProfile(ctx context.Context, profileTypeID string, labelSelector string, start int64, end int64, maxNodes *int64) (*ProfileResponse, error)
 	GetSpanProfile(ctx context.Context, profileTypeID string, labelSelector string, spanSelector []string, start int64, end int64, maxNodes *int64) (*ProfileResponse, error)
@@ -105,17 +109,45 @@ func (d *PyroscopeDatasource) profileTypes(ctx context.Context, req *backend.Cal
 
 func (d *PyroscopeDatasource) labelNames(ctx context.Context, req *backend.CallResourceRequest, sender backend.CallResourceResponseSender) error {
 	ctxLogger := logger.FromContext(ctx)
-	res, err := d.client.LabelNames(ctx)
+
+	u, err := url.Parse(req.URL)
+	if err != nil {
+		ctxLogger.Error("Failed to parse URL", "error", err, "function", logEntrypoint())
+		return err
+	}
+	query := u.Query()
+
+	start, _ := strconv.ParseInt(query.Get("start"), 10, 64)
+	end, _ := strconv.ParseInt(query.Get("end"), 10, 64)
+	labelSelector := query.Get("query")
+	matchers, err := parser.ParseMetricSelector(labelSelector)
+	if err != nil {
+		ctxLogger.Error("Could not parse label selector", "error", err, "function", logEntrypoint())
+		return fmt.Errorf("failed parsing label selector: %v", err)
+	}
+
+	labelNames, err := d.client.LabelNames(ctx, labelSelector, start, end)
 	if err != nil {
 		ctxLogger.Error("Received error from client", "error", err, "function", logEntrypoint())
 		return fmt.Errorf("error calling LabelNames: %v", err)
 	}
-	data, err := json.Marshal(res)
+
+	finalLabels := make([]string, 0)
+	for _, label := range labelNames {
+		if slices.ContainsFunc(matchers, func(m *labels.Matcher) bool {
+			return m.Name == label
+		}) {
+			continue
+		}
+		finalLabels = append(finalLabels, label)
+	}
+
+	jsonResponse, err := json.Marshal(finalLabels)
 	if err != nil {
 		ctxLogger.Error("Failed to marshal response", "error", err, "function", logEntrypoint())
 		return err
 	}
-	err = sender.Send(&backend.CallResourceResponse{Body: data, Headers: req.Headers, Status: 200})
+	err = sender.Send(&backend.CallResourceResponse{Body: jsonResponse, Headers: req.Headers, Status: 200})
 	if err != nil {
 		ctxLogger.Error("Failed to send response", "error", err, "function", logEntrypoint())
 		return err
@@ -139,7 +171,11 @@ func (d *PyroscopeDatasource) labelValues(ctx context.Context, req *backend.Call
 	}
 	query := u.Query()
 
-	res, err := d.client.LabelValues(ctx, query["label"][0])
+	start, _ := strconv.ParseInt(query.Get("start"), 10, 64)
+	end, _ := strconv.ParseInt(query.Get("end"), 10, 64)
+	label := query.Get("label")
+
+	res, err := d.client.LabelValues(ctx, label, query.Get("query"), start, end)
 	if err != nil {
 		ctxLogger.Error("Received error from client", "error", err, "function", logEntrypoint())
 		return fmt.Errorf("error calling LabelValues: %v", err)

pkg/tsdb/grafana-pyroscope-datasource/pyroscopeClient.go

@@ -238,10 +238,14 @@ func getUnits(profileTypeID string) string {
 	return unit
 }
 
-func (c *PyroscopeClient) LabelNames(ctx context.Context) ([]string, error) {
+func (c *PyroscopeClient) LabelNames(ctx context.Context, labelSelector string, start int64, end int64) ([]string, error) {
 	ctx, span := tracing.DefaultTracer().Start(ctx, "datasource.pyroscope.LabelNames")
 	defer span.End()
-	resp, err := c.connectClient.LabelNames(ctx, connect.NewRequest(&typesv1.LabelNamesRequest{}))
+	resp, err := c.connectClient.LabelNames(ctx, connect.NewRequest(&typesv1.LabelNamesRequest{
+		Matchers: []string{labelSelector},
+		Start:    start,
+		End:      end,
+	}))
 	if err != nil {
 		logger.Error("Received error from client", "error", err, "function", logEntrypoint())
 		span.RecordError(err)
@@ -259,10 +263,15 @@ func (c *PyroscopeClient) LabelNames(ctx context.Context) ([]string, error) {
 	return filtered, nil
 }
 
-func (c *PyroscopeClient) LabelValues(ctx context.Context, label string) ([]string, error) {
+func (c *PyroscopeClient) LabelValues(ctx context.Context, label string, labelSelector string, start int64, end int64) ([]string, error) {
 	ctx, span := tracing.DefaultTracer().Start(ctx, "datasource.pyroscope.LabelValues")
 	defer span.End()
-	resp, err := c.connectClient.LabelValues(ctx, connect.NewRequest(&typesv1.LabelValuesRequest{Name: label}))
+	resp, err := c.connectClient.LabelValues(ctx, connect.NewRequest(&typesv1.LabelValuesRequest{
+		Name:     label,
+		Matchers: []string{labelSelector},
+		Start:    start,
+		End:      end,
+	}))
 	if err != nil {
 		logger.Error("Received error from client", "error", err, "function", logEntrypoint())
 		span.RecordError(err)

pkg/tsdb/grafana-pyroscope-datasource/query_test.go

@@ -288,11 +288,11 @@ func (f *FakeClient) ProfileTypes(ctx context.Context) ([]*ProfileType, error) {
 	}, nil
 }
 
-func (f *FakeClient) LabelValues(ctx context.Context, label string) ([]string, error) {
+func (f *FakeClient) LabelValues(ctx context.Context, label string, labelSelector string, start int64, end int64) ([]string, error) {
 	panic("implement me")
 }
 
-func (f *FakeClient) LabelNames(ctx context.Context) ([]string, error) {
+func (f *FakeClient) LabelNames(ctx context.Context, labelSelector string, start int64, end int64) ([]string, error) {
 	panic("implement me")
 }
 

public/app/plugins/datasource/grafana-pyroscope-datasource/QueryEditor/LabelsEditor.tsx

@@ -32,7 +32,7 @@ export function LabelsEditor(props: Props) {
       <CodeEditor
         value={props.value}
         language={langId}
-        onBlur={props.onChange}
+        onChange={props.onChange}
         containerStyles={styles.queryField}
         monacoOptions={{
           folding: false,

public/app/plugins/datasource/grafana-pyroscope-datasource/QueryEditor/QueryEditor.test.tsx

@@ -111,6 +111,8 @@ function setupDs() {
     },
   ] as ProfileTypeMessage[]);
 
+  ds.getLabelNames = jest.fn().mockResolvedValue(['label_one']);
+
   return ds;
 }
 

public/app/plugins/datasource/grafana-pyroscope-datasource/QueryEditor/QueryEditor.tsx

@@ -1,12 +1,12 @@
 import deepEqual from 'fast-deep-equal';
-import React, { useCallback, useEffect } from 'react';
-import { useAsync } from 'react-use';
+import { debounce } from 'lodash';
+import React, { useCallback, useEffect, useState } from 'react';
 
 import { CoreApp, QueryEditorProps, TimeRange } from '@grafana/data';
 import { LoadingPlaceholder } from '@grafana/ui';
 
 import { normalizeQuery, PyroscopeDataSource } from '../datasource';
-import { PyroscopeDataSourceOptions, ProfileTypeMessage, Query } from '../types';
+import { ProfileTypeMessage, PyroscopeDataSourceOptions, Query } from '../types';
 
 import { EditorRow } from './EditorRow';
 import { EditorRows } from './EditorRows';
@@ -17,6 +17,8 @@ import { QueryOptions } from './QueryOptions';
 
 export type Props = QueryEditorProps<PyroscopeDataSource, Query, PyroscopeDataSourceOptions>;
 
+const labelSelectorRegex = /(\w+)\s*=\s*("[^,"]+")/g;
+
 export function QueryEditor(props: Props) {
   const { onChange, onRunQuery, datasource, query, range, app } = props;
 
@@ -115,33 +117,62 @@ function useLabels(
   // Round to nearest 5 seconds. If the range is something like last 1h then every render the range values change slightly
   // and what ever has range as dependency is rerun. So this effectively debounces the queries.
   const unpreciseRange = {
-    to: Math.ceil((range?.to.valueOf() || 0) / 5000) * 5000,
-    from: Math.floor((range?.from.valueOf() || 0) / 5000) * 5000,
+    to: Math.ceil((range?.to.valueOf() || 0) / 10000) * 10000,
+    from: Math.floor((range?.from.valueOf() || 0) / 10000) * 10000,
   };
 
-  const labelsResult = useAsync(() => {
-    return datasource.getLabelNames(query.profileTypeId + query.labelSelector, unpreciseRange.from, unpreciseRange.to);
-  }, [datasource, query.profileTypeId, query.labelSelector, unpreciseRange.to, unpreciseRange.from]);
+  // Transforms user input into a valid label selector including the profile type.
+  // It can optionally remove a label, used to support editing existing label values.
+  const createSelector = (rawInput: string, profileTypeId: string, labelToRemove: string): string => {
+    let labels: string[] = [`__profile_type__=\"${profileTypeId}\"`];
+    let match;
+    while ((match = labelSelectorRegex.exec(rawInput)) !== null) {
+      if (match[1] && match[2]) {
+        if (match[1] === labelToRemove) {
+          continue;
+        }
+        labels.push(`${match[1]}=${match[2]}`);
+      }
+    }
+    return `{${labels.join(',')}}`;
+  };
 
-  // Create a function with range and query already baked in so we don't have to send those everywhere
-  const getLabelValues = useCallback(
-    (label: string) => {
-      return datasource.getLabelValues(
-        query.profileTypeId + query.labelSelector,
-        label,
+  const [labels, setLabels] = useState(() => ['']);
+
+  useEffect(() => {
+    const fetchData = async () => {
+      const labels = await datasource.getLabelNames(
+        createSelector(query.labelSelector, query.profileTypeId, ''),
         unpreciseRange.from,
         unpreciseRange.to
       );
+
+      setLabels(labels);
+    };
+    fetchData();
+  }, [query, unpreciseRange.from, unpreciseRange.to, datasource, setLabels]);
+
+  // Create a function with range and query already baked in, so we don't have to send those everywhere
+  const getLabelValues = useCallback(
+    (label: string) => {
+      let labelSelector = createSelector(query.labelSelector, query.profileTypeId, label);
+      return datasource.getLabelValues(labelSelector, label, unpreciseRange.from, unpreciseRange.to);
     },
-    [query, datasource, unpreciseRange.to, unpreciseRange.from]
+    [datasource, query.labelSelector, query.profileTypeId, unpreciseRange.to, unpreciseRange.from]
   );
 
+  const onChangeDebounced = debounce((value: string) => {
+    if (onChange) {
+      onChange({ ...query, labelSelector: value });
+    }
+  }, 200);
+
   const onLabelSelectorChange = useCallback(
     (value: string) => {
-      onChange({ ...query, labelSelector: value });
+      onChangeDebounced(value);
     },
-    [onChange, query]
+    [onChangeDebounced]
   );
 
-  return { labels: labelsResult.value, getLabelValues, onLabelSelectorChange };
+  return { labels, getLabelValues, onLabelSelectorChange };
 }

public/app/plugins/datasource/grafana-pyroscope-datasource/QueryEditor/autocomplete.ts

@@ -86,13 +86,15 @@ export class CompletionProvider implements monacoTypes.languages.CompletionItemP
         });
       case 'IN_LABEL_VALUE':
         let values = await this.getLabelValues(situation.labelName);
-        return values.map((key) => {
-          return {
-            label: key,
-            insertText: situation.betweenQuotes ? key : `"${key}"`,
-            type: 'LABEL_VALUE',
-          };
-        });
+        return values
+          ? values.map((key) => {
+              return {
+                label: key,
+                insertText: situation.betweenQuotes ? key : `"${key}"`,
+                type: 'LABEL_VALUE',
+              };
+            })
+          : [];
       default:
         throw new Error(`Unexpected situation ${situation}`);
     }

public/app/plugins/datasource/grafana-pyroscope-datasource/pyroscopeql/pyroscopeql.ts

@@ -2,7 +2,7 @@ import type { languages } from 'monaco-editor';
 
 export const languageConfiguration: languages.LanguageConfiguration = {
   // the default separators except `@$`
-  wordPattern: /(-?\d*\.\d\w*)|([^`~!#%^&*()\-=+\[{\]}\\|;:'",.<>\/?\s]+)/g,
+  wordPattern: /(-?\d*\.\d\w*)|([^`~!#%^&*()=+\[{\]}\\|;:'",<>\/?\s]+)/g,
   brackets: [['{', '}']],
   autoClosingPairs: [
     { open: '{', close: '}' },