/**
  * standard SS method, update search fields for ModelAdmin
  * @return FieldSet
  **/
 function scaffoldSearchFields()
 {
     $fields = parent::scaffoldSearchFields();
     $fields->replaceField("OrderID", new NumericField("OrderID", "Order Number"));
     return $fields;
 }
 /**
  * Determine which properties on the DataObject are
  * searchable, and map them to their default {@link FormField}
  * representations. Used for scaffolding a searchform for {@link ModelAdmin}.
  *
  * Some additional logic is included for switching field labels, based on
  * how generic or specific the field type is.
  *
  * Used by {@link SearchContext}.
  *
  * @param array $_params
  * 	'fieldClasses': Associative array of field names as keys and FormField classes as values
  * 	'restrictFields': Numeric array of a field name whitelist
  * @return FieldList
  */
 public function scaffoldSearchFields($_params = null)
 {
     $fields = parent::scaffoldSearchFields($_params);
     $fields->replaceField("OrderID", new NumericField("OrderID", "Order Number"));
     return $fields;
 }