60   function tryCatch(fn, obj, arg) {  argument
62       return { type: "normal", arg: fn.call(obj, arg) };
64       return { type: "throw", arg: err };
113       prototype[method] = function(arg) {  argument
114         return this._invoke(method, arg);
146   runtime.awrap = function(arg) {  argument
147     return { __await: arg };
151     function invoke(method, arg, resolve, reject) {  argument
152       var record = tryCatch(generator[method], generator, arg);
154         reject(record.arg);
156         var result = record.arg;
192     function enqueue(method, arg) {  argument
195           invoke(method, arg, resolve, reject);
249     return function invoke(method, arg) {  argument
256           throw arg;
265       context.arg = arg;
280           context.sent = context._sent = context.arg;
285             throw context.arg;
288           context.dispatchException(context.arg);
291           context.abrupt("return", context.arg);
304           if (record.arg === ContinueSentinel) {
309             value: record.arg,
318           context.arg = record.arg;
340           context.arg = undefined;
351         context.arg = new TypeError(
358     var record = tryCatch(method, delegate.iterator, context.arg);
362       context.arg = record.arg;
367     var info = record.arg;
371       context.arg = new TypeError("iterator result is not an object");
392         context.arg = undefined;
443     delete record.arg;
536       this.arg = undefined;
558         throw rootRecord.arg;
572         record.arg = exception;
579           context.arg = undefined;
624     abrupt: function(type, arg) {  argument
638           finallyEntry.tryLoc <= arg &&
639           arg <= finallyEntry.finallyLoc) {
647       record.arg = arg;
660         throw record.arg;
665         this.next = record.arg;
667         this.rval = this.arg = record.arg;
694             var thrown = record.arg;
716         this.arg = undefined;