code: public void ackRecentMissedCalls() throws WorkspaceApiException {
          try {
              ApiSuccessResponse resp = targetsApi.ackRecentMissedCalls();
              Util.throwIfNotOk(resp);
          }
          catch(ApiException ex) {
              throw new WorkspaceApiException("Cannot ack recent missed calls", ex);
          }
      }
docs: Acknowledge missed calls in the list of recent targets.