public static void removeThreadLocalCache() {
        FIELD_THREAD_LOCAL.remove();
        CLASS_CONTENT_THREAD_LOCAL.remove();
        CONTENT_THREAD_LOCAL.remove();
    }
Gets the interfaces for the specified class.

@param cls             the class to look up, may be {@code null}
@param interfacesFound the {@code Set} of interfaces for the class
fastexcel-core/src/main/java/cn/idev/excel/util/ClassUtils.java