question: public String consumeCssIdentifier ( ) { int start = pos ; while ( ! isEmpty ( ) && ( matchesWord ( ) || matchesAny ( '-' , '_' ) ) ) pos ++ ; return queue . substring ( start , pos ) ; }
target:  Consume a CSS identifier (ID or class) off the queue (letter, digit, -, _) http://www.w3.org/TR/CSS2/syndata.html#value-def-identifier