syntax_data: {"ast_node_type":"other","tokens":[{"end":19,"kind":"keyword","start":0,"text":"#[track_caller]"}]}
source_snippet:     #[track_caller]
context_before:     /// Panics if `self` is not dereferenceable.
context_after:     pub fn pointee_metadata_ty_or_projection(self, tcx: TyCtxt<'tcx>) -> Ty<'tcx> {