import { ConstrainedMetaModel } from '@asyncapi/modelina';
import { TypeScriptRenderer } from '@asyncapi/modelina/lib/types/generators/typescript/TypeScriptRenderer';
import { BaseGeneratorContext } from './validation';
/**
 * Configuration options for the union preset
 */
export interface UnionPresetOptions {
    /** Whether to include validation methods in generated union types */
    includeValidation: boolean;
}
/**
 * Creates a union preset that adds marshalling/unmarshalling methods to union types
 *
 * @param options Configuration for union generation
 * @param context Generator context containing input type information
 * @returns Modelina preset object with union marshalling functionality
 *
 * @example
 * ```typescript
 * const preset = createUnionPreset({
 *   includeValidation: true
 * }, context);
 * ```
 */
export declare function createUnionPreset(options: UnionPresetOptions, context: BaseGeneratorContext): {
    type: {
        self({ model, content, renderer }: {
            model: ConstrainedMetaModel;
            content: string;
            renderer: TypeScriptRenderer;
        }): string;
    };
};