Question about Figure 3 in the paper

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Hi authors, I have a small question about the following piece of code and Figure 3.

```
1. for module, zero_conv in zip(self.input_blocks, self.zero_convs):
2. if guided_hint is not None:
3. h = module(h, emb, context)
4. h += guided_hint
5. guided_hint = None
```

If I understand correctly, `h` should be the input z_t in Figure 3, `guided_hint` should be condition `c_f` in Figure 3.

Why we feed `h` through `module` and then add with `guided_hint` (Line 3-4)? According to Figure 3, shouldn't we add `h` with `guided_hint` directly? (Line 5)

Thank you for answering!

Start by reading the Figure 3 description in the paper alongside the shown input_blocks loop, focusing on the roles of h and guided_hint and the order of the module call and addition. Resolve whether the implementation matches the figure, then document the explanation for the questioned lines.

Written by the indexing model from the issue text.