/**
 * Mark as a non-translatable string. Use within a derive() call to mark content as not derivable (e.g., not possible to statically analyze).
 *
 * @example
 * function nonDerivableFunction() {
 *   return Math.random();
 * }
 *
 * function derivableFunction() {
 *   if (condition) {
 *     return declareVar(nonDerivableFunction())
 *   }
 *   return 'John Doe';
 * }
 *
 * const gt = useGT();
 * gt(`My name is ${derive(derivableFunction())}`);
 *
 * @param {string | number | boolean | null | undefined} variable - The variable to sanitize.
 * @param {Object} [options] - The options for the sanitization.
 * @param {string} [options.$name] - The name of the variable.
 * @returns {string} The sanitized value.
 */
export declare function declareVar(variable: string | number | boolean | null | undefined, options?: {
    $name?: string;
}): string;