code: public void ensureQuorumPresent(Operation op) {
          if (isInactive()) {
              return;
          }
  
          QuorumImpl quorum = findQuorum(op);
          if (quorum == null) {
              return;
          }
          quorum.ensureQuorumPresent(op);
      }
docs: Ensures that the quorum for the given operation is present. This requires that there is a quorum configured under the
  name which is returned by the operation service.
  This in turn requires that the operation is named and that the operation service is a {@link QuorumAwareService}.
  
  @param op the operation for which the quorum should be present
  @throws QuorumException if the operation requires a quorum and the quorum is not present