import type { Nullish } from '../../../@aileron/declare';
/**
 * Function to combine multiple conditions with a specified operator.
 * @param conditions - Conditions to combine
 * @param operator - Operator to use ('&&' or '||').
 *                   Default is '&&' (all conditions must be true)
 * @returns Combined condition expression
 */
export declare const combineConditions: (conditions: (string | Nullish)[], operator?: "&&" | "||") => string | null;