/**
 * Maximum number of `data_visualization` blocks Slack renders in a single
 * message. Additional ones beyond this cap are dropped.
 */
export declare const DATA_VISUALIZATION_MAX = 2;
/**
 * Checks that a payload contains at most {@link DATA_VISUALIZATION_MAX}
 * `data_visualization` blocks. Slack renders only the first two data
 * visualization blocks per message; any beyond that are silently dropped.
 * @param blocks - array of Block Kit blocks
 * @returns array of error messages (empty when within the limit)
 */
export declare function checkDataVisualizationMax(blocks: readonly {
    type?: string;
}[]): string[];
//# sourceMappingURL=check-data-visualization-max.d.ts.map