syntax_data: {"ast_node_type":"other","tokens":[{"end":56,"kind":"keyword","start":0,"text":"ty::ReVar(vid)"}]}
source_snippet:             ty::ReVar(vid) => Region::new_var(tcx, vid),
context_before:             ty::ReStatic => tcx.lifetimes.re_static,
context_after:             ty::RePlaceholder(region) => Region::new_placeholder(tcx, region),