docs: def getsize(self, path=None, client_kwargs=None, header=None):
          """
          Return the size, in bytes, of path.
  
          Args:
              path (str): File path or URL.
              client_kwargs (dict): Client arguments.
              header (dict): Object header.
  
          Returns:
              int: Size in bytes.
          """
          return self._getsize_from_header(self.head(path, client_kwargs, header))