syntax_data: {"ast_node_type":"other","tokens":[{"end":77,"kind":"keyword","start":0,"text":"DesugaringKind::FormatLiteral"}]}
source_snippet:             DesugaringKind::FormatLiteral { .. } => value == "FormatLiteral",
context_before:             DesugaringKind::PatTyRange => value == "PatTyRange",
context_after:         }