import type { ValuesType } from '../../../strk-types/helpers.js';
export declare const CairoOptionVariant: {
    readonly Some: 0;
    readonly None: 1;
};
export type CairoOptionVariant = ValuesType<typeof CairoOptionVariant>;
export declare class CairoOption<T> {
    readonly Some?: T | undefined;
    readonly None?: boolean | undefined;
    constructor(variant: CairoOptionVariant | number, content?: T);
    /**
     *
     * @returns the content of the valid variant of a Cairo custom Enum.
     *  If None, returns 'undefined'.
     */
    unwrap(): T | undefined;
    /**
     *
     * @returns true if the valid variant is 'isSome'.
     */
    isSome(): boolean;
    /**
     *
     * @returns true if the valid variant is 'isNone'.
     */
    isNone(): boolean;
}
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