Gtk.TreeView.prototype.set_level_indentation

function set_level_indentation(indentation:Number):void {
    // Gjs wrapper for gtk_tree_view_set_level_indentation()
}

Sets the amount of extra indentation for child levels to use in tree_view in addition to the default indentation. The value should be specified in pixels, a value of 0 disables this feature and in this case only the default indentation will be used. This does not have any visible effects for lists.

Since 2.12