syntax_data: {"ast_node_type":"other","tokens":[{"end":21,"kind":"keyword","start":0,"text":"match"}]}
source_snippet:         match *self {
context_before:     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
context_after:             ty::LateParamRegionKind::Anon(idx) => write!(f, "LateAnon({idx})"),