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 input.   encoder_hidden_states (torch.FloatTensor) —
The encoder hidden states with shape (batch, sequence_length, feature_dim).   class_labels (torch.Tensor, optional, defaults to None) —
Optional class labels for conditioning. Their emb