tion_dim: int = 1024 attention_head_dim: Union = 64 num_attention_heads: Union = None  )   Parameters   sample_size (int or Tuple[int, int], optional, defaults to None) —
Height and width of input/output sample.   in_channels (int, optional, defaults to 4) — The number of channels in the input sample.   out_channels (int, optional, defaults to 4) — The number of channels in the output.   down_block_types (Tuple[str], optional, defaults to ("Cro