syntax_data: {"ast_node_type":"other","tokens":[{"end":78,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// this point. The `DropIdx` will be created if it doesn't already exist.
context_before:     /// Returns the [DropIdx] for the innermost drop if the function unwound at
context_after:     fn diverge_cleanup(&mut self) -> DropIdx {