code: public boolean noFieldsInvalid(Collection<I_CmsFormField> fields) {
  
          for (I_CmsFormField field : fields) {
              if (field.getValidationStatus().equals(I_CmsFormField.ValidationStatus.invalid)) {
                  return false;
              }
          }
          return true;
      }
docs: Returns true if none of the fields in a collection are marked as invalid.<p>
  
  @param fields the form fields
  
  @return true if none of the fields are invalid