) —
additional residuals to be added within UNet down blocks, for example from T2I-Adapter side model(s)   Returns 
UNet2DConditionOutput or tuple
  
If return_dict is True, an UNet2DConditionOutput is returned, otherwise
a tuple is returned where the first element is the sample tensor.
  The UNet2DConditionModel forward method.  fuse_qkv_projections  < source > ( )    Enables fused QKV projections. For self-attention modules, all projection ma