 (int or Tuple[int], optional, defaults to 1280) —
The dimension of the cross attention features.   transformer_layers_per_block (int, Tuple[int], or Tuple[Tuple] , optional, defaults to 1) —
The number of transformer blocks of type BasicTransformerBlock. Only relevant for
CrossAttnDownBlock2D, CrossAttnUpBlock2D,
UNetMidBlock2DCrossAttn.    A conditional 2D UNet model that takes a noisy sample, conditional state, and a timestep and returns a s