code: protected String createDDMFormRuleAction(
  		DDMForm ddmForm, long groupId, long commerceAccountId,
  		long cpDefinitionId) {
  
  		String callFunctionStatement =
  			"call('getCPInstanceOptionsValues', concat(%s), '%s')";
  
  		return String.format(
  			callFunctionStatement,
  			createDDMFormRuleInputMapping(
  				ddmForm, groupId, commerceAccountId, cpDefinitionId),
  			createDDMFormRuleOutputMapping(ddmForm));
  	}
docs: Create a DDM form rule action as a call function, e.g.
  <pre>
  call(
  'getCPInstanceOptionsValues',
  concat(
  'cpDefinitionId=56698', ';', '56703=', getValue('56703'), ';',
  '56706=', getValue('56706')),
  '56703=color;56706=size')
  </pre>