{"ast_node_type":"other","tokens":[{"end":93,"kind":"keyword","start":0,"text":"[]"}]}
            [] dyn_compatibility_violations: rustc_middle::traits::DynCompatibilityViolation,
            [] upvars_mentioned: rustc_data_structures::fx::FxIndexMap<rustc_hir::HirId, rustc_hir::Upvar>,
            [] codegen_unit: rustc_middle::mir::mono::CodegenUnit<'tcx>,