syntax_data: {"ast_node_type":"other","tokens":[{"end":78,"kind":"keyword","start":0,"text":"debug_assert!(!key.has_non_region_infer()"}]}
source_snippet:     debug_assert!(!key.has_non_region_infer() && !key.has_non_region_param());
context_before: pub(crate) fn first_method_vtable_slot<'tcx>(tcx: TyCtxt<'tcx>, key: ty::TraitRef<'tcx>) -> usize {
context_after:     debug_assert_eq!(