nl_tokens: Checks if value is likely an arguments object .
pl_tokens: function isArguments ( value ) { // Safari 8.1 makes `arguments.callee` enumerable in strict mode. return isArrayLikeObject ( value ) && hasOwnProperty$2 . call ( value , 'callee' ) && ( ! propertyIsEnumerable . call ( value , 'callee' ) || objectToString$2 . <mask> ( value ) == argsTag ) ; }