How to use the beakerx.utils.getValue function in beakerx

def getOptions(args, kwargs):
        if len(args) > 1:
            return args[1][:]
        else:
            return getValue(kwargs, 'options', [])

def addTextArea(self, *args, **kwargs):
        textarea = BeakerxTextArea(
            description=self.getDescription(args, kwargs))
        textarea.cols = getValue(kwargs, 'width', -1)
        textarea.rows = getValue(kwargs, 'height', -1)
        textarea.value = getValue(kwargs, 'value', "")
        textarea.placeholder = getValue(kwargs, 'placeholder', "")
        self.children += (textarea,)
        self.components[textarea.description] = textarea
        return textarea

def addComboBox(self, *args, **kwargs):
        dropdown = BeakerxComboBox(description=self.getDescription(args, kwargs))
        dropdown.options = self.getOptions(args, kwargs)
        dropdown.original_options = self.getOptions(args, kwargs)
        dropdown.editable = getValue(kwargs, 'editable', False)
        self.children += (dropdown,)
        self.components[dropdown.description] = dropdown
        return dropdown

def addTextField(self, *args, **kwargs):
        text = BeakerxText(description=self.getDescription(args, kwargs))
        text.size = getValue(kwargs, 'width', -1)
        self.children += (text,)
        self.components[text.description] = text
        return text

def addList(self, *args, **kwargs):
        multi_select = getValue(kwargs, 'multi', True)
        if multi_select:
            list = SelectMultipleWithRows(
                description=self.getDescription(args, kwargs))
        else:
            list = SelectMultipleSingle(
                description=self.getDescription(args, kwargs))
        list.options = self.getOptions(args, kwargs)
        list.size = getValue(kwargs, 'rows', len(list.options))

        self.children += (list,)
        self.components[list.description] = list
        return list

def addCheckBox(self, *args, **kwargs):
        checkbox = BeakerxCheckbox(description=self.getDescription(args, kwargs))
        checkbox.value = getValue(kwargs, 'value', False)
        self.children += (checkbox,)
        self.components[checkbox.description] = checkbox
        return checkbox

def getDescription(args, kwargs):
        if len(args) > 0:
            return args[0]
        else:
            return getValue(kwargs, 'description', "")

def addButton(self, *args, **kwargs):
        button = BeakerxButton(description=self.getDescription(args, kwargs))
        button.tag = getValue(kwargs, 'tag', "")
        button.on_click(self.buttonCallback)
        self.children += (button,)
        return button