syntax_data: {"ast_node_type":"other","tokens":[{"end":5,"kind":"keyword","start":0,"text":"where"}]}
source_snippet: where
context_before: impl<'tcx, F, I> Iterator for NeedsDropTypes<'tcx, F>
context_after:     F: Fn(ty::AdtDef<'tcx>, GenericArgsRef<'tcx>) -> NeedsDropResult<I>,