syntax_data: {"ast_node_type":"other","tokens":[{"end":68,"kind":"keyword","start":0,"text":"debug!(\"own_existential_vtable_entry:"}]}
source_snippet:             debug!("own_existential_vtable_entry: not vtable safe");
context_before:         if !is_vtable_safe_method(tcx, trait_def_id, trait_method) {
context_after:             return None;