nal = None cross_attention_kwargs: Optional = None encoder_attention_mask: Optional = None return_dict: bool = True encoder_hidden_states_1: Optional = None encoder_attention_mask_1: Optional = None  ) → UNet2DConditionOutput or tuple  Parameters   sample (torch.FloatTensor) —
The noisy input tensor with the following shape (batch, channel, height, width).   timestep (torch.FloatTensor or float or int) — The number of timesteps to denoise an in