What a PreHook may return for a bit. All fields are optional; an empty result (or void) makes the hook a pure observer.
void
Optional
Drop the bit from the output entirely.
Override the output format for this bit only.
Patches to apply to this bit, after the patch document's entries for it.
What a PreHook may return for a bit. All fields are optional; an empty result (or
void) makes the hook a pure observer.