public function getCMSFields()
   {
      $f = parent::getCMSFields();
      $manager = new DataObjectManager(
         $this, // Controller
         'Endangereds', // Source name
         'Endangered', // Source class
         array('Family' => 'Family', 'Genus' => 'Genus','Species' => 'Species','CommonName' => 'CommonName'), // Headings
         'getCMSFields_forPopup' // Detail fields function or FieldSet
         ,""// Filter clause
         ,"Genus"// Sort clause
         // Join clause
      );
      
      $f->addFieldToTab("Root.Content.EndangeredList", $manager);
      
      return $f;
   }

class Endangered extends DataObject
{
   static $db = array (
      'Family' => 'Text',      
      'Genus' => 'Text',
      'Hybrid' => 'Text',
      'Species' => 'Text',      
      'Infraspecific' => 'Text',
      'Cultivar' => 'Text',
      'CultivarGroup' => 'Text',
      'Synonym' => 'Text',
      'CommonName' => 'Text',
      'Continent' => 'Text',
      'GeoRegion' => 'Text',
      'Herbarium' => 'Boolean',
      'IUCNCode' => 'Text',
      'Fieldx1' => 'Text',
      'Var' => 'Text'
   );
   
   static $has_one = array (
      'EndangeredPage' => 'EndangeredPage',
      'PlantImage' => 'Image'
   );
   
   static $searchable_fields = array(
   'Family','Genus','Species','CommonName'
   );
   
   
   public function getCMSFields_forPopup()
   {
      return new FieldSet(
         
         new TextField('Family'),
         new TextField('Fieldx1'),
         new TextField('Genus'),
         new TextField('Hybrid'),
         new TextField('Species'),
         new TextField('Var'),
         new TextField('Infraspecific'),
         new TextField('Cultivar'),
         new TextField('CultivarGroup'),
         new TextField('Synonym'),
         new TextField('CommonName'),
         new TextField('Continent'),
         new TextField('GeoRegion'),
         new CheckboxField('Herbarium','In herbarium?'),
         new TextField('IUCNCode'),
                  
         new ImageField("PlantImage", "Plant Image")
      );
   }
}