insert

Description:

public void insert (Widget child, int position)

Insert the child into the this at position.

If a sort function is set, the widget will actually be inserted at the calculated position.

If position is -1, or larger than the total number of items in the this, then the child will be appended to the end.

this	a `GtkListBox`
child	the `GtkWidget` to add
position	the position to insert `child` in