nl_tokens: / --- Helpers Copied from mcavage / node - assert - plus
pl_tokens: function _assert ( arg , <mask> , name ) { name = name || type ; throw new assert . AssertionError ( { message : util . format ( '%s (%s) required' , name , type ) , actual : typeof ( arg ) , expected : type , operator : '===' , stackStartFunction : _assert . caller } ) ; }