code: public void initiateTransfer(String connId, String destination) throws WorkspaceApiException {
          this.initiateTransfer(connId, destination, null, null, null, null, null);
      }
docs: Initiate a two-step transfer by placing the first call on hold and dialing the destination number (step 1).
  After initiating the transfer, you can use `completeTransfer()` to complete the transfer (step 2).
  @param connId The connection ID of the call to be transferred. This call will be placed on hold.
  @param destination The number where the call will be transferred.