code: public boolean tryLock()
      {
          if (Tracing.isAnyTracingEnabled() && trace.isEntryEnabled())
              trace.entry(this
                          , cclass
                          , "tryLock"
                              );
  
          boolean isLocked = true;
          if (fileLock == null) // Did we get the lock?
              isLocked = false;
  
          if (Tracing.isAnyTracingEnabled() && trace.isEntryEnabled())
              trace.exit(this
                         , cclass
                         , "tryLock"
                         , "returns isLocked=" + isLocked + "(bloolean)"
                              );
          return isLocked;
      }
docs: Test the lock.
  
  @return true if the lock is held, otherwise false.