syntax_data: {"ast_node_type":"import","tokens":[{"end":53,"kind":"keyword","start":0,"text":"for"}]}
source_snippet:             for clause in param_env.caller_bounds() {
context_before:         if matches!(trait_pred.self_ty().kind(), ty::Param(_) | ty::Placeholder(_)) {
context_after:                 if let ty::ClauseKind::Trait(clause_pred) = clause.kind().skip_binder()