render_focus
Description:
[ Version ( deprecated = true ,  deprecated_since = "4.10" ) ]
public void render_focus (StyleContext context, double x, double y, double width, double height)
  public void render_focus (StyleContext context, double x, double y, double width, double height)
Warning: render_focus is deprecated since 4.10.
Creates a render node for the focus outline according to context, and appends it to the current node of 
      this, without changing the current node.
Parameters:
| this | a `GtkSnapshot` | 
| context | the style context that defines the focus ring | 
| x | X origin of the rectangle | 
| y | Y origin of the rectangle | 
| width | rectangle width | 
| height | rectangle height |