syntax_data: {"ast_node_type":"other","tokens":[{"end":58,"kind":"keyword","start":0,"text":"self.parent.insert(impl_def_id,"}]}
source_snippet:             self.parent.insert(impl_def_id, trait_def_id);
context_after:             self.children.entry(trait_def_id).or_default().insert_blindly(tcx, impl_def_id);