@Override
        Detector preLoadOne(Class<? extends Detector> loadedClass, String classname,
                            MimeTypes mimeTypes) {
            // If they asked for the mime types as a detector, give
            //  them the one we've already created. TIKA-1708
            if (MimeTypes.class.equals(loadedClass)) {
                return mimeTypes;
            }
            // Continue with normal loading
            return null;
        }
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