processor. This is strongly recommended when setting trainable attention processors.    Sets the attention processor to use to compute attention.  set_default_attn_processor  < source > ( )    Disables custom attention processors and sets the default attention implementation.  PriorTransformerOutput  class diffusers.models.prior_transformer.PriorTransformerOutput  < source > ( predicted_image_embedding: FloatTensor  )   Parameters   predicted_image_embedding (torch.FloatTensor of shape (batch_size, embedding_dim)) —