import BaseRule from './baseRule';
declare class RequiredIf extends BaseRule {
    /**
     * The condition that validates the attribute
     */
    condition: boolean | CallableFunction;
    /**
     * Create a new required validation rule based on a condition.
     */
    constructor(condition: boolean | CallableFunction);
    /**
     * Convert the rule to a validation string.
     */
    toString(): string;
}
export default RequiredIf;