@Override
  public Set<DistributedMember> findDistributedMembers(InetAddress address) {
    Set<InternalDistributedMember> allMembers = dm.getDistributionManagerIdsIncludingAdmin();
    Set<DistributedMember> results = new HashSet<>(2);

    // Search through the set of all members
    for (InternalDistributedMember member : allMembers) {

      Set<InetAddress> equivalentAddresses = dm.getEquivalents(member.getInetAddress());
      // Check to see if the passed in address is matches one of the addresses on
      // the given member.
      if (address.equals(member.getInetAddress()) || equivalentAddresses.contains(address)) {
        results.add(member);
      }
    }

    return results;
  }
Returns the string value of the distribution manager's id.
geode-core/src/main/java/org/apache/geode/distributed/internal/InternalDistributedSystem.java