utions of backbone features.    Enables the FreeU mechanism from https://arxiv.org/abs/2309.11497. The suffixes after the scaling factors represent the stage blocks where they are being applied. Please refer to the official repository for combinations of values that
are known to work well for different pipelines such as Stable Diffusion v1, v2, and Stable Diffusion XL.  forward  < source > ( sample: FloatTensor timestep: Union encoder_hidden_st