parameters: (self)
docstring: The size of the final partial batch for dataset.
  
      Will return None if has_partial_batch is False or batch_size is None.
docstring_summary: The size of the final partial batch for dataset.
docstring_tokens: The size of the final partial batch for dataset .
function: def partial_batch_size(self):
      """The size of the final partial batch for dataset.
  
      Will return None if has_partial_batch is False or batch_size is None.
      """
      raise NotImplementedError
function_tokens: def partial_batch_size ( self ) : raise NotImplementedError