code: public String getGroupName() {
  		if (collapsibleToggle != null) {
  			return collapsibleToggle.getId();
  		} else if (!collapsibleList.isEmpty()) {
  			// This is only to retain compatibility with the
  			// previous implementation, and should be removed post-Sfp11,
  			// as it doesn't make much sense to create a group without
  			// something to toggle it.
  			return collapsibleList.get(0).getId();
  		}
  
  		return "";
  	}
docs: Retrieves the common name used by all collapsible components in the group.
  
  @return the common name to use.