import { GroupedSelectValues, InputSelectValue, PossibleSelectValue } from './InputSelect';
/**
 * Helper function to understand and refine type of a single selected value
 * @param selectedValue possible value returned from select component
 * @returns true if selected value is single, from this point TypeScript will treat this as `SelectValue` type
 */
export declare function isSingleValueSelected(selectedValue: PossibleSelectValue): selectedValue is InputSelectValue;
/**
 * Helper function to understand and refine type of a set of selected values
 * @param selectedValue possible value returned from select component
 * @returns true if selected value is an array of selected values, from this point TypeScript will treat this as `SelectValue[]` type
 */
export declare function isMultiValueSelected(selectedValue: PossibleSelectValue): selectedValue is InputSelectValue[];
/**
 * Type-guard to check if prop `initialValues` is a GroupedSelectValues or SelectValue
 */
export declare function isGroupedSelectValues(initialValues?: GroupedSelectValues | InputSelectValue[]): initialValues is GroupedSelectValues;
/**
 * Helper function to extract only a specific property from the `SelectValue`
 * @param selectedValue possible value returned from select component
 * @param pathToValue optional path.to.property. Default is `value`
 * @returns a string or an array of strings.
 * Examples:
 * ```
 * flatSelectValues({value: 'ABCD', label: 'T-Shirt XL'})
 * // returns 'ABCD'
 *
 * flatSelectValues([
 *   {value: 'ABCD', label: 'T-Shirt M'},
 *   {value: '1234', label: 'T-Shirt XL'},
 * ], 'label')
 * // returns ['T-Shirt M', 'T-Shirt XL']
 * ```
 */
export declare function flatSelectValues(selectedValue: PossibleSelectValue, pathToValue?: string): null | string | Array<string | number>;
/**
 * To be used when storing the flatten value and there is the need
 * to retrieve the `defaultValue` to pass as <InputSelect> prop
 * @param currentValue the current value that is being stored in app state
 * @param initialValues the array of SelectValue objects that should contain the `currentValue`
 * @param pathToValue optional path.to.property. Default is `value`
 * @returns the matched value or values, otherwise undefined.
 */
export declare function getDefaultValueFromFlatten({ currentValue, initialValues, pathToValue, }: {
    currentValue?: string | Array<string | number> | null;
    initialValues?: GroupedSelectValues | InputSelectValue[];
    pathToValue?: string;
}): InputSelectValue | InputSelectValue[] | undefined;