docs: public ConsistentHash getReadConsistentHash() {
        switch (phase) {
           case CONFLICT_RESOLUTION:
           case NO_REBALANCE:
              assert pendingCH == null;
              assert unionCH == null;
              return currentCH;
           case TRANSITORY:
              return pendingCH;
           case READ_OLD_WRITE_ALL:
              assert pendingCH != null;
              assert unionCH != null;
              return currentCH;
           case READ_ALL_WRITE_ALL:
              assert pendingCH != null;
              return unionCH;
           case READ_NEW_WRITE_ALL:
              assert unionCH != null;
              return pendingCH;
           default:
              throw new IllegalStateException();
        }
     }