ComplexSelector.parse constructor
Parses a complex selector from contents.
If passed, url is the name of the file from which contents comes.
allowParent controls whether a ParentSelector is allowed in this
selector.
Throws a SassFormatException if parsing fails.
Implementation
factory ComplexSelector.parse(String contents,
{Object? url, bool allowParent = true}) =>
SelectorParser(contents, url: url, allowParent: allowParent)
.parseComplexSelector();