@Override
        ConfigurableThreadPoolExecutor createComposite(List<ConfigurableThreadPoolExecutor> loaded,
                                                       MimeTypes mimeTypes, ServiceLoader loader) {
            return loaded.get(0);
        }
Gets parameters from a given

@param el xml node which has {@link #PARAMS_TAG_NAME} child
@return Map of key values read from xml
tika-core/src/main/java/org/apache/tika/config/TikaConfig.java