syntax_data: {"ast_node_type":"other","tokens":[{"end":5,"kind":"keyword","start":0,"text":"where"}]}
source_snippet: where
context_before: fn sanity_check_via_rustc_peek<'tcx, A>(tcx: TyCtxt<'tcx>, mut cursor: ResultsCursor<'_, 'tcx, A>)
context_after:     A: RustcPeekAt<'tcx>,