docs: 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);
      }