code: public boolean isParent(RegistryEntry registryEntry) {
  		RegistryEntry parentRegistryEntry = getParentRegistryEntry();
  		while (parentRegistryEntry != null) {
  			if (parentRegistryEntry.equals(registryEntry)) {
  				return true;
  			}
  			parentRegistryEntry = parentRegistryEntry.getParentRegistryEntry();
  		}
  		return false;
  	}
docs: Check the parameter is a parent of <b>this</b> {@link RegistryEntry}
  instance
  
  @param registryEntry
  parent to check
  @return true if the parameter is a parent