{"ast_node_type":"other","tokens":[{"end":99,"kind":"keyword","start":0,"text":"self.resolve_lang_item(LangItem::DerefMut).and_then(|it|"}]}
                            self.resolve_lang_item(LangItem::DerefMut).and_then(|it| it.as_trait())
                        if let Some(deref_trait) =
                        {