declare type Options = {
    /** test for high surrogates (D800-DBFF) */
    high?: boolean;
    /** test for low surrogates (DC00-DFFF) */
    low?: boolean;
};
/**
 * Deterimine is a character is a surrogate
 *
 * @param input the character to test
 * @param __namedParameters see {@link Options}
 * @default high true
 * @defaultValue low true
 * @returns true if the specified character is a unicode surrogate
 */
export declare function isSurrogate(input: string, { high, low }?: Options): boolean;
export default isSurrogate;