declare namespace javax {
    namespace swing {
        namespace plaf {
            namespace basic {
                namespace BasicInternalFrameTitlePane {
                    /**
                     * This class should be treated as a "protected" inner class.
                     * Instantiate it only within subclasses of <code>Foo</code>.
                     */
                    // @ts-ignore
                    class RestoreAction extends javax.swing.AbstractAction {
                        // @ts-ignore
                        constructor()
                        // @ts-ignore
                        public actionPerformed(evt: java.awt.event.ActionEvent): void
                    }
                }
            }
        }
    }
}