import type { ValidationIssue } from '../types';
/**
 * Validate Questionnaire items recursively.
 *
 * Covers linkId uniqueness and FHIR R4 que-1 through que-12 item invariants.
 */
export declare function validateQuestionnaireItems(items: any[], linkIdSet: Set<string>, basePath: string, fhirVersion?: 'R4' | 'R5' | 'R6'): ValidationIssue[];
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