syntax_data: {"ast_node_type":"other","tokens":[{"end":65,"kind":"keyword","start":0,"text":"(UsageKind::Single(lhs),"}]}
source_snippet:             (UsageKind::Single(lhs), UsageKind::Single(rhs)) => {
context_before:             (UsageKind::Mixed, _) | (_, UsageKind::Mixed) => UsageKind::Mixed,
context_after:                 if lhs == rhs {