code: K put(final K name) {
      K internal = cache.get(name);
      if (internal != null) {
        lookups++;
        return internal;
      }
  
      // Track the usage count only during initialization
      if (!initialized) {
        UseCount useCount = transientMap.get(name);
        if (useCount != null) {
          useCount.increment();
          if (useCount.get() >= useThreshold) {
            promote(name);
          }
          return useCount.value;
        }
        useCount = new UseCount(name);
        transientMap.put(name, useCount);
      }
      return null;
    }
docs: Add a given name to the cache or track use count.
  exist. If the name already exists, then the internal value is returned.
  
  @param name name to be looked up
  @return internal value for the name if found; otherwise null