docs: def get_list_endpoint(self, rel=u"instances"):
          """
          get the configured list entpoint for the schema.type
          :param rel: lookup rel: value inside the links section
          :returns the value
          :raises APIException
          """
          schema_loaded = not self.schema is None
          links_present = "links" in self.schema.keys()
          if (schema_loaded and links_present):
               for row in self.schema['links']:
                    if row['rel'] == rel:
                        #print "row %s" % row
                        return row
          raise APIException("ENDPOINT_NOTFOUND","invalid endpoint")