code: public <T> List<T> getRequired(Class<T> type, Object locator) throws ReferenceException {
  		return find(type, locator, true);
  	}
docs: Gets all component references that match specified locator. At least one
  component reference must be present and matching to the specified type.
  
  If it doesn't the method throws an error.
  
  @param type    the Class type that defined the type of the result.
  @param locator the locator to find references by.
  @return a list with matching component references.
  
  @throws ReferenceException when no references found.