syntax_data: {"ast_node_type":"other","tokens":[{"end":45,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// actually carry lifetime requirements.
context_before:     /// strange rules like `<T as Foo<'static>>::Bar: Sized` that
context_after:     pub fn is_sized(self, tcx: TyCtxt<'tcx>, typing_env: ty::TypingEnv<'tcx>) -> bool {