 (quantized) dot
product between the text embedding and image embedding as proposed in the unclip paper
https://arxiv.org/abs/2204.06125 If it is None, no additional embeddings will be prepended.   time_embed_dim (int, *optional*, defaults to None) -- The dimension of timestep embeddings. If None, will be set to num_attention_heads * attention_head_dim`   embedding_proj_dim (int, optional, default to None) —
The dimension of proj_embedding. If 