ntion processors and sets the default attention implementation.  UVit2DConvEmbed  class diffusers.models.unets.uvit_2d.UVit2DConvEmbed  < source > ( in_channels block_out_channels vocab_size elementwise_affine eps bias  )     UVitBlock  class diffusers.models.unets.uvit_2d.UVitBlock  < source > ( channels num_res_blocks: int hidden_size hidden_dropout ln_elementwise_affine layer_norm_eps use_bias block_num_heads attention_dropout downsample: bo