Method setImmutable

java/com/tigervnc/rfb/VoidParameter.java:63–66

()

  abstract public String getValueStr();
  public boolean isBool() { return false; }
  public void setImmutable() {
    vlog.debug("Set immutable "+getName());
    immutable = true;
  }

  public void setHasBeenSet() {
    _hasBeenSet = true;