syntax_data: {"ast_node_type":"other","tokens":[{"end":51,"kind":"keyword","start":0,"text":"for"}]}
source_snippet:             for implicit_bound in implicit_bounds {
context_before:             self.out.reserve(implicit_bounds.len());
context_after:                 let cause = self.cause(ObligationCauseCode::ObjectTypeBound(ty, explicit_bound));