public static String[] getTrueMetas(Properties featureConfig) {
		ArrayList<String> trueMetas = new ArrayList<String>();

		Enumeration keys = featureConfig.propertyNames();
		while (keys.hasMoreElements()) {
			String key = (String) keys.nextElement();
			if (key.matches("[a-zA-Z]+_feat_enabled")
					&& featureConfig.getProperty(key).equals("true")) {
				trueMetas.add(key.substring(0, key.indexOf("_feat_enabled")));
			}
		}
		String[] ret = new String[trueMetas.size()];
		trueMetas.toArray(ret);
		return ret;
	}