nl_tokens: Contributes additional methods to a constructor
pl_tokens: function mixin ( ctor , methods ) { var keyCopier = function ( key ) { ctor . prototype [ <mask> ] = methods [ key ] ; } ; Object . keys ( methods ) . forEach ( keyCopier ) ; Object . getOwnPropertySymbols && Object . getOwnPropertySymbols ( methods ) . forEach ( keyCopier ) ; return ctor ; }