/**
 * Implements the Optional patters
 * @public
 * @class
 */
export declare class Optional<T> {
    private readonly value;
    /**
     * Create a new instance of optional
     * @param value the value set as optional
     * @private
     */
    constructor(value: T);
    /**
     * Allows to access this optional value
     * @returns this optional value
     * @public
     */
    get(): T;
    /**
     * Validate is this optional value is present
     * @returns true if this optional contains a not null and not undefined value, false otherwise
     * @public
     */
    isPresent(): boolean;
    /**
     * Create an optional starting from the provided value.
     * @param value the value to set on this optional. The value can be undefined or null
     * @returns a new Optional instance
     * @public
     * @static
     */
    static from<T>(value: T): Optional<T>;
}