= class Gtk::WindowGroup

== Object Hierarchy
* Object
  * GLib::Instantiatable
    * GLib::Object
      * Gtk::WindowGroup

== Class Methods
--- Gtk::WindowGroup.new
    Creates a new Gtk::WindowGroup object. Grabs added with Gtk.grab_add only affect windows within the same Gtk::WindowGroup.
    * Returns: a new Gtk::WindowGroup

== Instance Methods
--- add(window)
    Adds a window to a Gtk::WindowGroup.
    * window: the Gtk::Window to add.
    * Returns: self  

--- remove(window)
    Removes a window from a Gtk::WindowGroup.
    * window: the Gtk::Window to remove.
    * Returns: self

- ((<Masao>))
