d when class_embed_type="projection".
class_embeddings_concat (bool, optional, defaults to False): Whether to concatenate the time
embeddings with the class embeddings.
mid_block_only_cross_attention (bool, optional, defaults to None):
Whether to use cross attention with the mid block when using the UNetMidBlock2DSimpleCrossAttn. If
only_cross_attention is given as a single boolean and mid_block_only_cross_attention is None, the
only_cross_atte