import { FormEl, FormulaError, FormulaOptions } from '../../types';
/**
 * Create a validation checker for an element group - when an element has been updated.  If there are no options
 * just return the element validity. If there are options, check with custom validators if thet exist,
 * and also check for custom messages
 *
 * @private
 *
 * @param inputGroup The name of the group of elements that this validation message will update
 * @param elementGroup The element group containing the elment siblings
 * @param options The passed formula options
 *
 * @returns Function that is called each time an element is updated which returns field validity state
 */
export declare function createValidationChecker(inputGroup: string, elementGroup: FormEl[], options?: FormulaOptions): (el: FormEl, elValue: unknown | unknown[]) => FormulaError;