nl_tokens: Walks across nodes and call payload for every node that pass selector check .
pl_tokens: function walk ( args ) { args . <mask> . forEach ( function ( item , i ) { var name = args . selector ( item ) ; var namespace = args . namespaceSelector && makeNamespace ( args . namespaceSelector ( item ) ) ; var extraSymbols = args . getExtraSymbols ( args . node , i ) ; var info = name && getPrefixInfo ( name , namespace , extraSymbols ) ; if ( ! info ) return ; args . payload ( info , i ) ; } ) ; }