@Override
  public void fromData(DataInput in) throws IOException, ClassNotFoundException {
    boolean hasHost = in.readBoolean();
    if (hasHost) {
      host = DataSerializer.readString(in);
    }
    boolean hasMember = in.readBoolean();
    if (hasMember) {
      member = DataSerializer.readString(in);
    }
    boolean hasParent = in.readBoolean();
    if (hasParent) {
      parent = DataSerializer.readString(in);
    }
    boolean hasChild = in.readBoolean();
    if (hasChild) {
      child = DataSerializer.readString(in);
    }
  }
Returns the name of the child region of a colocated pair
geode-core/src/main/java/org/apache/geode/internal/cache/partitioned/ColocatedRegionDetails.java