CssSelector CssSelector is the main entry point of the component and can convert CSS selectors to XPath expressions.
Token Token represents a CSS Selector token.
TokenStream TokenStream represents a stream of CSS Selector tokens.
Tokenizer Tokenizer lexes a CSS Selector to tokens.
XPathExpr XPathExpr represents an XPath expression.
XPathExprOr XPathExprOr represents XPath |'d expressions.