code: public void reconnectCall(String connId, String heldConnId) throws WorkspaceApiException {
          this.reconnectCall(connId, heldConnId, null, null);
      }
docs: Reconnect the specified call. This releases the established call and retrieves the held call
  in one step. This is a quick way to to do `releaseCall()` and `retrieveCall()`.
  @param connId The connection ID of the established call (will be released).
  @param heldConnId The ID of the held call (will be retrieved).