code: @Override
      public boolean containsValue(Object value) {
          try {
              lockAllSegments();
              for (LinkedHashMapSegment<K, V> seg : segments) {
                  if (seg.containsValue(value))
                      return true;
              }
              return false;
          } finally {
              unlockAllSegments();
          }
      }
docs: Returns <tt>true</tt> if this map maps one or more keys to the specified value.
  
  @return <tt>true</tt> if this map maps one or more keys to the specified value.