syntax_data: {"ast_node_type":"other","tokens":[{"end":87,"kind":"keyword","start":0,"text":"for"}]}
source_snippet:             for (pred, span) in tcx.explicit_item_bounds(item).iter_identity_copied() {
context_before:         DefKind::OpaqueTy => {
context_after:                 try_visit!(visitor.visit(span, pred));