import type { Block, BlockType } from '../../types';
/**
 * Attempts to fix block invalidation by applying build-in validation fixes
 * like moving all extra classNames to the className attribute.
 *
 * @param block     block object.
 * @param blockType Block type. This is normalize not necessary and
 *                  can be inferred from the block name,
 *                  but it's here for performance reasons.
 *
 * @return Fixed block object
 */
export declare function applyBuiltInValidationFixes(block: Block, blockType: BlockType): Block;
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