nl_tokens: Tests whether there is a variable declaration accessible to the current scope ie including parent scope
pl_tokens: function ( name ) { var pos = name . indexOf ( "." ) ; if ( pos > - 1 ) { name = name . substring ( 0 , <mask> ) ; } for ( var tmp = this . __scope ; tmp ; tmp = tmp . parent ) { if ( tmp . vars [ name ] !== undefined ) { return true ; } } return false ; }