s implemented
for all models (such as downloading or saving). reverse_transformer_layers_per_block : (Tuple[Tuple], optional, defaults to None):
The number of transformer blocks of type BasicTransformerBlock, in the upsampling
blocks of the U-Net. Only relevant if transformer_layers_per_block is of type Tuple[Tuple] and for
~models.unet_2d_blocks.CrossAttnDownBlock2D, ~models.unet_2d_blocks.CrossAttnUpBlock2D,
~models.unet_2d_blocks.UNetMidBloc