import type { RenderedFieldListItem } from '../types/field.js';
import type { FieldConfig } from '../types/definitions.js';
type SwapValidationContext = {
    getFieldConfig: (entityType: string, entityBundle: string, fieldName: string) => FieldConfig | undefined;
    checkBlockBundlePermission: (bundle: string, operation: 'edit') => boolean;
    blockHasRestrictedAncestor: (uuid: string) => boolean;
};
/**
 * Check whether two blocks can be swapped.
 * Returns null if swap is possible, or a reason string if not.
 */
export declare function getSwapDisabledReason(blockA: RenderedFieldListItem, blockB: RenderedFieldListItem, ctx: SwapValidationContext): string | null;
export {};