How to use the pydm.utilities.iconfont.IconFont function in pydm

def setup_ui(self):
        """
        Create the required UI elements for the form.

        Returns
        -------
        None
        """
        iconfont = IconFont()

        self.setWindowTitle("PyDM Widget Rules Editor")
        vlayout = QtWidgets.QVBoxLayout()
        vlayout.setContentsMargins(5, 5, 5, 5)
        vlayout.setSpacing(5)
        self.setLayout(vlayout)

        hlayout = QtWidgets.QHBoxLayout()
        hlayout.setContentsMargins(0, 0, 0, 0)
        hlayout.setSpacing(5)
        vlayout.addLayout(hlayout)

        # Creating the widgets for the String List and
        # buttons to add and remove actions
        list_frame = QtWidgets.QFrame(parent=self)
        list_frame.setMinimumHeight(300)

def generate_alarm_icons(self):
        self.alarm_icons = (
            IconFont().icon('circle', color=self.noAlarmIconColor),
            IconFont().icon('circle', color=self.minorAlarmIconColor),
            IconFont().icon('exclamation-circle',
                            color=self.majorAlarmIconColor),
            IconFont().icon('question-circle',
                            color=self.invalidAlarmIconColor),
            IconFont().icon('times-circle',
                            color=self.disconnectedAlarmIconColor)
        )
        for i in range(0, self.count()):
            self.set_initial_icon_for_tab(i)

def __init__(self):
        icon = IconFont().icon("cogs")
        name = "Read Device Recursive"
        group = "Rogue"
        use_with_widgets = True
        ExternalTool.__init__(self, icon=icon, name=name, group=group, use_with_widgets=use_with_widgets)

def __init__(self):
        icon = IconFont().icon("code")
        name = "Dummy Tool 2"
        group = "Example"
        use_with_widgets = True
        use_without_widget = False
        ExternalTool.__init__(self, icon=icon, name=name, group=group,
                              use_with_widgets=use_with_widgets,
                              use_without_widget=use_without_widget)

def generate_alarm_icons(self):
        self.alarm_icons = (
            IconFont().icon('circle', color=self.noAlarmIconColor),
            IconFont().icon('circle', color=self.minorAlarmIconColor),
            IconFont().icon('exclamation-circle',
                            color=self.majorAlarmIconColor),
            IconFont().icon('question-circle',
                            color=self.invalidAlarmIconColor),
            IconFont().icon('times-circle',
                            color=self.disconnectedAlarmIconColor)
        )
        for i in range(0, self.count()):
            self.set_initial_icon_for_tab(i)