def _create_body(self, message, value, **extra):
_label = Label()
textblock = TextBlock()
textblock.Text = message
textblock.TextWrapping = TextWrapping.Wrap
_label.Content = textblock
_label.Margin = Thickness(10)
_label.SetValue(Grid.ColumnSpanProperty, 2)
_label.SetValue(Grid.RowProperty, 0)
self.Content.AddChild(_label)
selector = self._create_selector(value, **extra)
if selector:
self.Content.AddChild(selector)
selector.Focus()
