code: def get_cursor(cls, cursor_type=_CursorType.PLAIN) -> Cursor:
          
          _cur = None
          if cls._use_pool:
              _connection_source = yield from cls.get_pool()
          else:
              _connection_source = yield from aiopg.connect(echo=False, **cls._connection_params)
  
          if cursor_type == _CursorType.PLAIN:
              _cur = yield from _connection_source.cursor()
          if cursor_type == _CursorType.NAMEDTUPLE:
              _cur = yield from _connection_source.cursor(cursor_factory=psycopg2.extras.NamedTupleCursor)
          if cursor_type == _CursorType.DICT:
              _cur = yield from _connection_source.cursor(cursor_factory=psycopg2.extras.DictCursor)
  
          if not cls._use_pool:
              _cur = cursor_context_manager(_connection_source, _cur)
  
          return _cur
docs: Yields:
              new client-side cursor from existing db connection pool