: str = 'silu' latent_channels: int = 3 sample_size: int = 32 num_vq_embeddings: int = 256 norm_num_groups: int = 32 vq_embed_dim: Optional = None scaling_factor: float = 0.18215 norm_type: str = 'group' mid_block_add_attention = True lookup_from_codebook = False force_upcast = False  )   Parameters   in_channels (int, optional, defaults to 3) — Number of channels in the input image.   out_channels (int,  optional, defaults to 3) — Number of ch