@Override
        EncodingDetector preLoadOne(Class<? extends EncodingDetector> loadedClass, String classname,
                                    MimeTypes mimeTypes) {
            // Check for classes which can't be set in config
            // 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