def unregister(cls):
        """Unregister properties and operators corresponding to this panel."""
        bpy.utils.unregister_class(OpenGLPanelSettings)
        del bpy.types.Scene.opengl_panel_settings

        bpy.utils.unregister_class(ExportScreenshotImageOperator)
        bpy.utils.unregister_class(ExportScreenshotAnimationOperator)
        bpy.utils.unregister_class(SaveOpenGLRenderImageOperator)
        bpy.utils.unregister_class(ExportOpenGLRenderImageOperator)
        bpy.utils.unregister_class(ExportOpenGLRenderAnimationOperator)
Unregister properties and operators corresponding to this panel.
photogrammetry_importer/panels/view_3d_opengl_panel.py