code: private static Statistics getStatistics(Class<?> target, String signature)
     {
        initIfNeeded();
        Statistics statistics = MAPPING.get(signature);
        if (statistics == null)
        {
           synchronized (JCRAPIAspect.class)
           {
              Class<?> interfaceClass = findInterface(target);
              if (interfaceClass != null)
              {
                 Map<String, Statistics> allStatistics = ALL_STATISTICS.get(interfaceClass.getSimpleName());
                 if (allStatistics != null)
                 {
                    int index1 = signature.indexOf('(');
                    int index = signature.substring(0, index1).lastIndexOf('.');
                    String name = signature.substring(index + 1);
                    statistics = allStatistics.get(name);
                 }
              }
              if (statistics == null)
              {
                 statistics = UNKNOWN;
              }
              Map<String, Statistics> tempMapping = new HashMap<String, Statistics>(MAPPING);
              tempMapping.put(signature, statistics);
              MAPPING = Collections.unmodifiableMap(tempMapping);            
           }
        }
        if (statistics == UNKNOWN) // NOSONAR
        {
           return null;
        }
        return statistics;
     }
docs: Gives the corresponding statistics for the given target class and AspectJ signature
  @param target the target {@link Class}
  @param signature the AspectJ signature
  @return the related {@link Statistics} or <code>null</code> if it cannot be found