syntax_data: {"ast_node_type":"other","tokens":[{"end":25,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// children already.
context_before:     /// an impl with a parent. The impl must be present in the list of
context_after:     fn remove_existing(&mut self, tcx: TyCtxt<'tcx>, impl_def_id: DefId) {