import type { PromptResultUsage } from '../PromptResultUsage';
/**
 * Function `addUsage` will add multiple usages into one
 *
 * Note: If you provide 0 values, it returns ZERO_USAGE
 *
 * @public exported from `@promptbook/core`
 */
export declare function addUsage(...usageItems: ReadonlyArray<PromptResultUsage>): PromptResultUsage;