code: private QuorumImpl findQuorum(Operation op) {
          if (!isNamedOperation(op) || !isQuorumAware(op)) {
              return null;
          }
          String quorumName = getQuorumName(op);
          if (quorumName == null) {
              return null;
          }
          return quorums.get(quorumName);
      }
docs: Returns a {@link QuorumImpl} for the given operation. The operation should be named and the operation service should
  be a {@link QuorumAwareService}. This service will then return the quorum configured under the name returned by the
  operation service.
  
  @param op the operation for which the Quorum should be returned
  @return the quorum