syntax_data: {"ast_node_type":"impl","tokens":[{"end":58,"kind":"keyword","start":0,"text":")"}]}
source_snippet:     ) -> impl Iterator<Item = (Size, TyAndLayout<'tcx>)> {
context_before:         layout: &'a TyAndLayout<'tcx>,
context_after:         (0..layout.layout.fields().count()).filter_map(|i| {