listener = (callRecord) => {
      if (callRecord.matches(methodName, args, true /* isVerification */)) {
        count++;
        if (this.verificationMode_.verify(count)) {
          resolve();
          clearTimeout(timeout);
          this.callListeners_[methodName].delete(listener);
        }
      }
    }
Listens for calls to this function name
@param {!goog.labs.mock.MethodBinding_} callRecord The call record
    just added
@this {goog.labs.mock.MockManager_}