syntax_data: {"ast_node_type":"struct","tokens":[{"end":53,"kind":"keyword","start":0,"text":"struct"}]}
source_snippet:     struct UsedParamsNeedInstantiationVisitor<'tcx> {
context_before:     /// Collect all types that need to be `StructuralPartialEq`.
context_after:         tcx: TyCtxt<'tcx>,