Get a resolve undo entry from the index.
The returned entry is read-only and should not be modified or freed by the caller.
@param index an existing index object @param n the position of the entry @return a pointer to the resolve undo entry; null if out of bounds
See Implementation
Get a resolve undo entry from the index.
The returned entry is read-only and should not be modified or freed by the caller.
@param index an existing index object @param n the position of the entry @return a pointer to the resolve undo entry; null if out of bounds