public static IoTDBMetricObjNameFactory getInstance() {
    return IoTDBMetricObjNameFactoryHolder.INSTANCE;
  }
Determines whether the value requires quoting. According to the {@link ObjectName}
documentation, values can be quoted or unquoted. Unquoted values may not contain any of the
characters comma, equals, colon, or quote.

@param value a value to test
@return true when it requires quoting, false otherwise
iotdb-core/metrics/core/src/main/java/org/apache/iotdb/metrics/core/utils/IoTDBMetricObjNameFactory.java