@Override
  public DistributedMember findDistributedMember(String name) {
    for (DistributedMember member : dm.getDistributionManagerIdsIncludingAdmin()) {
      if (member.getName().equals(name)) {
        return member;
      }
    }
    return null;
  }
Returns the string value of the distribution manager's id.
geode-core/src/main/java/org/apache/geode/distributed/internal/InternalDistributedSystem.java