import { FormControl } from '@angular/forms';
/**
 * A custom validator to valdiate a range of numbers or dates.
 * This is internally to support the infarstructure and not intended to being used by custom code.
 *
 * @param p The field's name
 *
 */
export declare function validateRange(f: number | Date, t: number | Date): (c: FormControl) => {
    range: {
        valid: boolean;
    };
};