merge_pr_12808
Source: https://github.com/tidoust/reffy-reports/blob/398ec92/whatwg/idl/css-typed-om.idl Build: https://travis-ci.org/tidoust/reffy-reports/builds/423853333
Source: https://github.com/tidoust/reffy-reports/blob/398ec92/whatwg/idl/css-typed-om.idl Build: https://travis-ci.org/tidoust/reffy-reports/builds/423853333