def METHOD_NAME(self):
    """Initialize all available image handlers
    :return: True
    """
    # Internal and display name of the app (if supported by/on platform)
    self.SetAppName("GRASS GIS")
    self.SetVendorName("The GRASS Development Team")
    # create splash screen
    introImagePath = os.path.join(globalvar.IMGDIR, "splash_screen.png")
    introImage = wx.Image(introImagePath, wx.BITMAP_TYPE_PNG)
    introBmp = introImage.ConvertToBitmap()
    wx.adv.SplashScreen(
        bitmap=introBmp,
        splashStyle=wx.adv.SPLASH_CENTRE_ON_SCREEN | wx.adv.SPLASH_TIMEOUT,
        milliseconds=3000,
        parent=None,
        id=wx.ID_ANY,
    )
    wx.GetApp().Yield()
    def show_main_gui():
        # create and show main frame
        single = UserSettings.Get(
            group="appearance", key="singleWindow", subkey="enabled"
        )
        if single:
            from main_window.frame import GMFrame
        else:
            from lmgr.frame import GMFrame
        try:
            mainframe = GMFrame(
                parent=None, id=wx.ID_ANY, workspace=self.workspaceFile
            )
        except Exception as err:
            min_required_wx_version = [4, 2, 0]
            if not globalvar.CheckWxVersion(min_required_wx_version):
                error(err)
                warning(
                    _(
                        "Current version of wxPython {} is lower than "
                        "minimum required version {}".format(
                            wx.__version__,
                            ".".join(map(str, min_required_wx_version)),
                        )
                    )
                )
            else:
                raise
        else:
            mainframe.Show()
            self.SetTopWindow(mainframe)
    wx.CallAfter(show_main_gui)
    return True