import { IRNode } from "../types.js";
import type { KotlinConverterContext } from "./KotlinConverter.js";
/**
 * Applies the `unsupportedUnions` policy for an untagged union that survived
 * merging and has no usable discriminator.
 */
export declare function handleUnsupportedUnion(c: KotlinConverterContext, ir: IRNode): string;
/**
 * Pre-emission guard pass that throws on JSON Schema features Kotlin codegen
 * does not support: `not` and `patternProperties`. These are NOT silenced by
 * `unsupportedUnions: 'fallback'`.
 */
export declare function guardUnsupportedKeywords(_c: KotlinConverterContext, root: IRNode): void;