@Override
  public int hashCode() {
    final int prime = 31;
    int result = 1;
    result = prime * result + ((host == null) ? 0 : host.hashCode());
    result = prime * result + ((member == null) ? 0 : member.hashCode());
    result = prime * result + ((parent == null) ? 0 : parent.hashCode());
    result = prime * result + ((child == null) ? 0 : child.hashCode());
    return result;
  }
Returns the name of the child region of a colocated pair
geode-core/src/main/java/org/apache/geode/internal/cache/partitioned/ColocatedRegionDetails.java