syntax_data: {"ast_node_type":"other","tokens":[{"end":60,"kind":"keyword","start":0,"text":"DesugaringKind::OpaqueTy"}]}
source_snippet:             DesugaringKind::OpaqueTy => value == "OpaqueTy",
context_before:             DesugaringKind::YeetExpr => value == "YeetExpr",
context_after:             DesugaringKind::ForLoop => value == "ForLoop",