syntax_data: {"ast_node_type":"function","tokens":[{"end":86,"kind":"keyword","start":0,"text":"pub"}]}
source_snippet:     pub fn new_mut_ref(tcx: TyCtxt<'tcx>, r: Region<'tcx>, ty: Ty<'tcx>) -> Ty<'tcx> {
context_before:     #[inline]
context_after:         Ty::new_ref(tcx, r, ty, hir::Mutability::Mut)