public static <S> ServiceLoader<S> loadAll(final Class<S> clazz) {
        return ServiceLoader.load(clazz);
    }
Load all service loader.

@param <S>   the type parameter
@param clazz the clazz
@return the service loader
shenyu-common/src/main/java/org/apache/shenyu/common/utils/SpiLoadFactory.java