Whether the metadata contains a key named properties.

Merge new incoming data.

Given a tree, removes the keys that are not present in the schema.

Sanitizes the input according to the schemas.

Given a selector and a declaration list, creates the corresponding ruleset.

Cleans the cached data so it can be recalculated.

Converts a tree as in i18n-theme.json into a linear array containing metadata to translate a theme.json file.

Returns core’s origin config.

Returns a data structure used in theme.json translation.

Builds the path to the given file and checks that it is readable.