docs: public final void readObject(java.io.DataInputStream dataInputStream,
                                   ObjectManagerState objectManagerState)
                      throws ObjectManagerException
      {
          if (Tracing.isAnyTracingEnabled() && trace.isEntryEnabled())
              trace.entry(this, cclass,
                          "readObject",
                          "dataInputStream="
                                          + dataInputStream
                                          + "(java.io.DataInputStream)"
                                          + " objectManagerState="
                                          + objectManagerState
                                          + "(ObjectManagerState)");
  
          // Use restore() in place of this to get the correct single instance of the token.
  
          if (Tracing.isAnyTracingEnabled() && trace.isEntryEnabled())
              trace.exit(this, cclass,
                         "readObject",
                         "via UnsupportedOperationException");
          throw new UnsupportedOperationException();
  
      }