code: public static CreateRequest checkRequest(final FormItemList formItemList,
  			final CreateResponse createResponse) {
  		if (formItemList != null) {
  			final CreateRequestType type = checkType(formItemList,
  					createResponse);
  			if (type != null) {
  				return new CreateRequest(type);
  			}
  		}
  
  		return null;
  	}
docs: check a create request for validity concerning NSSP
  
  @param formItemList
  form item list extracted
  @param createResponse
  create response object
  @return create request object<br>
  <b>null</b> if the create request is invalid