/**
 * Collection of helper functions for working with string enums.\
 * Example:
 *
 * ```typescript
 * enum MyStringEnum {
 *     Key1: 'value1',
 *     Key2: 'value2',
 *     Key3: 'value3'
 * }
 *
 * // NOTE: It can't infer the type from the type param - types are not available
 * //       at runtime in TypeScript.
 * const stringEnum = new StringEnum<MyStringEnum>(MyStringEnum);
 *
 * const keys = stringEnum.keys; // keys === ['Key1', 'Key2', 'Key3']
 *
 * const isKey = stringEnum.isKey('kEy3'); // isKey === true
 * const isValue = stringEnum.isValue('key3'); // isValue === false - text is a key; not a value
 *
 * const value1 = stringEnum.getValueForKey('key3'); // value === MyStringEnum.Key3 ('value3')
 * const value2 = stringEnum.convertToValue('VALUE2'); // value === MyStringEnum.Key2 ('value2')
 *
 * const key = stringEnum.convertToKey('key2'); // key === 'Key2'
 * stringEnum.convertToKey('key2', true); // throws error - case doesn't match
 * ```
 * @typeParam TEnum The type of the enum.
 */
export declare class StringEnum<TEnum> {
    #private;
    /**
     * Initializes a new instance of the [[StringEnum]] class.
     * @param enumType The type of the enum.
     * @throws [[InvalidParameterError]] If enumType parameter is not a valid string enum.
     */
    constructor(enumType: Record<string, string>);
    /**
     * The enum type.
     */
    get type(): Record<string, string>;
    /**
     * The keys of the enum.
     */
    get keys(): string[];
    /**
     * The values of the enum.
     */
    get values(): TEnum[];
    /**
     * Returns whether the specified text is a key in the enum (case insensitive).
     * @param text The text to be checked.
     * @param caseSensitive true if the comparison should be case sensitive.  Defaults to false.
     * @returns true if text is a key in the enum; false otherwise.
     * @throws [[InvalidParameterError]] If text is undefined or null.
     */
    isKey(text: string, caseSensitive?: boolean): boolean;
    /**
     * Returns whether the specified text is a value in the enum (case insensitive).
     * @param text The text to be checked.
     * @param caseSensitive true if the comparison should be case sensitive.  Defaults to false.
     * @returns true if text is a value in the enum; false otherwise.
     * @throws [[InvalidParameterError]] If text is undefined or null.
     */
    isValue(text: string, caseSensitive?: boolean): boolean;
    /**
     * Converts the specified text to an enum key.
     * @param text The text to convert to an enum key.
     * @param caseSensitive true if the comparison should be case sensitive.  Defaults to false.
     * @returns text as an enum key.
     * @throws [[InvalidParameterError]] If text is not a key of the enum.
     */
    convertToKey(text: string, caseSensitive?: boolean): string;
    /**
     * Converts the specified text to an enum value.
     * @param text The text to convert to an enum value.
     * @param caseSensitive true if the comparison should be case sensitive.  Defaults to false.
     * @returns text as an enum value.
     * @throws [[InvalidParameterError]] If text is not a value of the enum.
     */
    convertToValue(text: string, caseSensitive?: boolean): TEnum;
    /**
     * Gets the value for the specified key.
     * @param key The key of the enum value.
     * @param caseSensitive true if the comparison should be case sensitive.  Defaults to false.
     * @returns The appropriate enum value.
     * @throws [[InvalidParameterError]] If key is not present in enumType.
     */
    getValueForKey(key: string, caseSensitive?: boolean): TEnum;
    /**
     * Gets the key for the specified enum value.
     * @param value The value to get the key for.
     * @param caseSensitive true if the comparison should be case sensitive.  Defaults to false.
     * @param enumType The type of the enum.
     * @throws [[InvalidParameterError]] If value is not a value for enumType.
     */
    getKeyForValue(value: string, caseSensitive?: boolean): string;
    /**
     * Returns a JSON representation of the current object instance.
     * @returns A JSON representation of the current object instance.
     */
    toJSON(): unknown;
}