How to use the @azure/core-amqp.Constants.defaultOperationTimeoutInMs function in @azure/core-amqp

await defaultLock.acquire(this.senderLock, () => {
          const options: AwaitableSenderOptions = this._createSenderOptions(
            Constants.defaultOperationTimeoutInMs,
            true
          );
          // shall retry forever at an interval of 15 seconds if the error is a retryable error
          // else bail out when the error is not retryable or the oepration succeeds.
          const config: RetryConfig = {
            operation: () => this._init(options),
            connectionId: this._context.connectionId,
            operationType: RetryOperationType.senderLink,
            connectionHost: this._context.config.host,
            retryOptions: {
              maxRetries: Constants.defaultMaxRetriesForConnection,
              retryDelayInMs: 15000
            }
          };
          return retry(config);
        });