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 ("CrossAttnDownBlock2D", "CrossAttnDownBlock2D", "CrossAttnDownBlock2D", "DownBlock2D")) —