_states_spatial_dimensions (`tuple(tuple(int, int))`, *optional*): A tuple containing the spatial dimension of each `hidden_state` needed to reshape the `hidden_states` to `batch, channels, height, width`. Due to padding, their spatial size cannot inferred before the `forward` method. attentions (`tuple(torch.FloatTensor)`, *optional*, returned when `output_attentions=True` is passed or when `config.output_attentions=True`): Tuple of `torch.FloatTensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length, sequence_length)`. Attentions weights after the attention softmax, used to compute the weighted average in the self-attention heads. Nr