syntax_data: {"ast_node_type":"other","tokens":[{"end":56,"kind":"keyword","start":0,"text":"DesugaringKind::WhileLoop"}]}
source_snippet:             DesugaringKind::WhileLoop => "`while` loop",
context_before:             DesugaringKind::ForLoop => "`for` loop",
context_after:             DesugaringKind::BoundModifier => "trait bound modifier",