code: public void setEnabled(boolean enabled) {
  		if (enabled && engine == null) {
  			return;
  		}
  
  		if (this.enabled != enabled) {
  			this.enabled = enabled;
  			this.changed = true;
  		}
  	}
docs: Sets if this script is enabled.
  <p>
  It's not possible to enable scripts without engine.
  
  @param enabled {@code true} if the script should be enabled, {@code false} otherwise
  @see #getEngine()