/**
 * Prefixes the provided CSS property if necessary. Returns null if the property isn't supported at all.
 * 
 * ```js
 * // The following may return "filter", "WebkitFilter", or "MozFilter" depending on the browser
 * let filterProperty = gsap.utils.checkPrefix("filter");
 * ```
 *
 * @param {string} property
 * @returns {string | null} The appropriately prefixed property 
 * @memberof gsap.utils
 */
function checkPrefix(property: string): string;