syntax_data: {"ast_node_type":"other","tokens":[{"end":70,"kind":"keyword","start":0,"text":"CanonicalVarKind::Const(_)"}]}
source_snippet:             CanonicalVarKind::Const(_) => CanonicalVarKind::Const(ui),
context_before:             CanonicalVarKind::Region(_) => CanonicalVarKind::Region(ui),