code: public boolean isEnabled(String topicName) {
          if (topicName == null || topicName.length() == 0) {
              throw new JavametricsException("Topic names must not be null or 0 length");
          }
          return getTopic(topicName).isEnabled();
      }
docs: /*
  (non-Javadoc)
  
  @see com.ibm.javametrics.Javametrics#isEnabled(java.lang.String)