How to use the gooey.gui.util.wx_util.dark_grey function in Gooey

def format_help_msg(self, parent, msg):
    base_text = wx.StaticText(parent, label=msg or '')
    wx_util.dark_grey(base_text)
    return base_text

def CreateHelpMsgWidget(self, parent):
    base_text = wx.StaticText(parent, label=self.data['help_msg'])
    # if self.data['nargs']:
    #   base_text.SetLabelText(base_text.GetLabelText() + self.CreateNargsMsg(action))
    wx_util.dark_grey(base_text)
    return base_text

def createHelpMsgWidget(self, parent):
    label_text = (self.formatExtendedHelpMsg(self.data)
                  if self.data['nargs']
                  else self.data['help'])
    base_text = wx.StaticText(parent, label=label_text or '')
    wx_util.dark_grey(base_text)
    return base_text

def createHelpMsgWidget(self, parent):
    label_text = (self.formatExtendedHelpMsg(self.data)
                  if self.data['nargs']
                  else self.data['help'])
    base_text = wx.StaticText(parent, label=label_text or '')
    wx_util.dark_grey(base_text)
    return base_text