docs: public void setFieldPopupMenu(String fieldLabel, JPopupMenu popup) {
  		Component c = this.fieldMap.get(fieldLabel);
  		if (c != null) {
  			if (c instanceof JComponent) {
  				((JComponent) c).setComponentPopupMenu(popup);
  			} else {
  				handleUnexpectedFieldClass(fieldLabel, c);
  			}
  		}
  	}