Method undo

ij/src/main/java/ij/plugin/Commands.java:81–87

()

	}
	
    void undo() {
    	ImagePlus imp = WindowManager.getCurrentImage();
		if (imp!=null)
			Undo.undo();
		else
			IJ.noImage();
	}

	void close() {
    	ImagePlus imp = WindowManager.getCurrentImage();