f upsample blocks to use. The corresponding class names will be: “FlaxUpBlock2D”,
“FlaxCrossAttnUpBlock2D”, “FlaxCrossAttnUpBlock2D”, “FlaxCrossAttnUpBlock2D”


block_out_channels (Tuple[int], optional, defaults to (320, 640, 1280, 1280)) —
The tuple of output channels for each block.


layers_per_block (int, optional, defaults to 2) —
The number of layers per block.


attention_head_dim (int or Tuple[int], optional, defaults to 8) —
The dimens