de  < source > ( )    Manually set the generation mode to unconditional (“marginal”) image generation.  set_image_to_text_mode  < source > ( )    Manually set the generation mode to image-conditioned text generation.  set_joint_mode  < source > ( )    Manually set the generation mode to unconditional joint image-text generation.  set_text_mode  < source > ( )    Manually set the generation mode to unconditional (“marginal”) text generation.  se