export declare type FalsyFallback = 'undefined' | 'null' | 'passthrough';
export interface IParseOptions {
    /**
     * Value to return when value parses as falsy:
     *
     * - `'undefined'` = `undefined`
     * - `'null'` = `null`
     * - `'passthrough'` = return the original falsy value
     */
    falsyFallback: FalsyFallback;
}