Gtk.TreeView.prototype.get_level_indentation

function get_level_indentation():Number {
    // Gjs wrapper for gtk_tree_view_get_level_indentation()
}

Returns the amount, in pixels, of extra indentation for child levels in tree_view.

Since 2.12

Returns: the amount of extra indentation for child levels in tree_view. A return value of 0 means that this feature is disabled.