{"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":"ConstraintCategory::CallArgument(_)"}]}
            ConstraintCategory::CallArgument(_) => "argument ",
            ConstraintCategory::Cast { is_implicit_coercion: true, .. } => "coercion ",
            ConstraintCategory::TypeAnnotation(AnnotationSource::GenericArg) => "generic argument ",