embedding_type (str, optional, defaults to positional) —
The type of position embedding to use for timesteps. Choose from positional or fourier.   time_embedding_dim (int, optional, defaults to None) —
An optional override for the dimension of the projected time embedding.   time_embedding_act_fn (str, optional, defaults to None) —
Optional activation function to use only once on the time embeddings before they are passed to the rest of
the UNe