{"ast_node_type":"other","tokens":[{"end":97,"kind":"keyword","start":0,"text":"LocalInfo::User(BindingForm::ImplicitSelf(hir::ImplicitSelfKind::RefMut))"}]}
                        LocalInfo::User(BindingForm::ImplicitSelf(hir::ImplicitSelfKind::RefMut))
                        decl.local_info(),
                    ) {