code: def filter_properties_target(namespaces_iter,
                               resource_types,
                               properties_target):
      
      def filter_namespace(namespace):
          for asn in namespace.get('resource_type_associations'):
              if (asn.get('name') in resource_types and
                      asn.get('properties_target') == properties_target):
                  return True
          return False
      return filter(filter_namespace, namespaces_iter)
docs: Filter metadata namespaces.
  
      Filtering is done based ongiven resource types and a properties target.
  
      :param namespaces_iter: Metadata namespaces iterable.
      :param resource_types: List of resource type names.
      :param properties_target: Name of the properties target.