syntax_data: {"ast_node_type":"function","tokens":[{"end":73,"kind":"keyword","start":0,"text":"pub"}]}
source_snippet:     pub fn new_var(tcx: TyCtxt<'tcx>, v: ty::RegionVid) -> Region<'tcx> {
context_before:     #[inline]
context_after:         // Use a pre-interned one when possible.