docs: public void requestUserSnapshot(final StoredProcedureInvocation invocation, final Connection c) {
          m_es.submit(new Runnable() {
              @Override
              public void run() {
                  try {
                      submitUserSnapshotRequest(invocation, c);
                  } catch (Exception e) {
                      VoltDB.crashLocalVoltDB("Exception submitting user snapshot request", true, e);
                  }
              }
          });
      }