/**
  * Populate the given child form for this object.
  * @param I2CE_Form $form
  * @param mixed $forms.  A string or an  array such, the form names (the child forms to populate)
  *                    - array( "demographic", "contact" )
  * @param array $orderBy An associative array of form names with an array of either string, field to sort by or an array of the fields
  *     Defaults to empty array
  *                    - array( "contact" => "contact_type" )
  * 
  */
 public function populateChildren($form, $forms, $orderBy = array())
 {
     if (is_scalar($forms)) {
         $forms = array($forms);
     }
     if (!is_array($forms)) {
         I2CE::raiseError("Invalid arguments passed to populateChildren: ");
         return;
     }
     foreach ($forms as $formName) {
         if (!array_key_exists($formName, $orderBy)) {
             $orderBy[$formName] = array();
         }
         $form->populateChild($formName, $orderBy[$formName]);
     }
 }