Multi-scale configurations for the decoder's QKV (query-key-value) transformations.
upsample_block_type (`str`, defaults to `"pixel_shuffle"`):
The type of block to use for upsampling in the decoder.
downsample_block_type (`str`, defaults to `"pixel_unshuffle"`):
The type of block to use for downsampling in the encoder.
decoder_norm_types (`Union[str, Tuple[str]]`, defaults to `"rms_norm"`):
The normalization type(s) to use in the decoder.
decoder_act_fns (`Union[str, Tuple[str]]`, defaults to `"silu"`):