How to use the tableauserverclient.models.exceptions.UnpopulatedPropertyError function in tableauserverclient

    @property
    def preview_image(self):
        if self._preview_image is None:
            error = "Workbook item must be populated with its preview image first."
            raise UnpopulatedPropertyError(error)
        return self._preview_image

def tables(self):
        if self._tables is None:
            error = "Database must be populated with tables first."
            raise UnpopulatedPropertyError(error)
        #  Each call to `.tables` should create a new pager, this just runs the callable
        return self._tables()

def default_workbook_permissions(self):
        if self._default_workbook_permissions is None:
            error = "Project item must be populated with permissions first."
            raise UnpopulatedPropertyError(error)
        return self._default_workbook_permissions()

def permissions(self):
        if self._permissions is None:
            error = "Project item must be populated with permissions first."
            raise UnpopulatedPropertyError(error)
        return self._permissions()

def default_datasource_permissions(self):
        if self._default_datasource_permissions is None:
            error = "Project item must be populated with permissions first."
            raise UnpopulatedPropertyError(error)
        return self._default_datasource_permissions()

def workbooks(self):
        if self._workbooks is None:
            error = "User item must be populated with workbooks first."
            raise UnpopulatedPropertyError(error)
        return self._workbooks()

def preview_image(self):
        if self._preview_image is None:
            error = "Workbook item must be populated with its preview image first."
            raise UnpopulatedPropertyError(error)
        return self._preview_image()

def total_views(self):
        if self._total_views is None:
            error = "Usage statistics must be requested when querying for view."
            raise UnpopulatedPropertyError(error)
        return self._total_views

    @property
    def connections(self):
        if self._connections is None:
            error = "Workbook item must be populated with connections first."
            raise UnpopulatedPropertyError(error)
        return self._connections

def connections(self):
        if self._connections is None:
            error = 'Datasource item must be populated with connections first.'
            raise UnpopulatedPropertyError(error)
        return self._connections()