docs: @Override
      public boolean contains(Object key)
      {
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              Tr.entry(tc, "contains", key);
  
          Bucket bucket = getBucketForKey(key);
  
          Element element = null; // d173022.12
          if (bucket != null) // d739870
          {
              synchronized (bucket)
              {
                  element = bucket.findByKey(key);
              } // d173022.12
          }
  
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              Tr.exit(tc, "contains", new Boolean(element != null));
  
          return element != null;
      }