How to use the kiwi.ui.widgets.list.Column function in kiwi

def _get_columns(self):
        return [Column('began', _('Began'), data_type=datetime.date,
                       width=100),
                Column('ended', _('Ended'), data_type=datetime.date,
                       width=100, sorted=True),
                Column('role.name', _('Role'), data_type=str, width=200),
                Column('salary', _('Salary'), data_type=currency)]

def _get_columns(self):
        return [Column('group', title=_('Group'), data_type=str, width=100,
                       sorted=True),
                Column('short_description', title=_('Parameter Name'),
                       data_type=str, expand=True),
                AccessorColumn('field_value', title=_('Current Value'),
                               accessor=self._get_parameter_value,
                               data_type=str, width=200)]

def get_columns(self):
        return [Column('sellable.base_sellable_info.description', 
                       title=_('Description'), 
                       data_type=str, expand=True, searchable=True),
                Column('quantity', title=_('Quantity'), data_type=float,
                       width=90, format_func=format_quantity,
                       editable=True),
                Column('sellable.unit_description', title=_('Unit'),
                        data_type=str, width=50),
                Column('cost', title=_('Cost'), data_type=currency, 
                       editable=True, width=90),
                Column('total', title=_('Total'), data_type=currency,
                       width=100)]

def _get_columns(self):
        return [Column('order_number_str', title=_('Number'), sorted=True,
                       data_type=str, width=100),
                Column('open_date', title=_('Date Started'),
                       data_type=datetime.date, justify=gtk.JUSTIFY_RIGHT),
                ForeignKeyColumn(Person, 'name', title=_('Supplier'), 
                                 data_type=str,
                                 obj_field='supplier', adapted=True,
                                 searchable=True, width=270),
                Column('purchase_total', title=_('Ordered'), 
                       data_type=currency, width=120),
                Column('received_total', title=_('Received'), 
                       data_type=currency)]

def _get_items_columns(self):
        return [Column('sellable.code', _("Code"), sorted=True, 
                       data_type=str, width=80),
                Column('sellable.base_sellable_info.description', 
                       _("Description"), data_type=str, expand=True, 
                       width=200),
                Column('quantity', _("Quantity"), data_type=int, width=100), 
                Column('price', _("Price"), data_type=currency, width=100),
                Column('total', _("Total"), data_type=currency, width=100)]

def _get_items_columns(self):
        return [Column('sellable.code', _("Code"), sorted=True, 
                       data_type=str, width=80),
                Column('sellable.base_sellable_info.description', 
                       _("Description"), data_type=str, expand=True, 
                       width=200),
                Column('quantity', _("Quantity"), data_type=int, width=100), 
                Column('price', _("Price"), data_type=currency, width=100),
                Column('total', _("Total"), data_type=currency, width=100)]

def _get_columns(self):
        return [Column('code', title=_('Number'), data_type=str, width=90),
                Column('base_sellable_info.description', 
                       title=_('Description'), 
                       data_type=str, expand=True, searchable=True),
                Column('base_sellable_info.price', title=_('Price'), 
                       data_type=currency, width=90)]

def _get_payments_columns(self):
        return [Column('payment_number', "#", data_type=int, width=50),
                Column('method.description', _("Method of Payment"),
                       expand=True, data_type=str, width=200),
                Column('due_date', _("Due Date"), sorted=True,
                       data_type=datetime.date, width=120),
                Column('status_str', _("Status"), data_type=str, width=100),
                Column('value', _("Value"), data_type=currency, width=100)]

def _get_ordered_columns(self):
        return [Column('sellable.base_sellable_info.description', 
                       title=_('Description'), 
                       data_type=str, expand=True, searchable=True),
                Column('quantity', title=_('Quantity'), data_type=float,
                       width=90, format_func=format_quantity,
                       editable=True),
                Column('sellable.unit_description', title=_('Unit'),
                        data_type=str, width=40),
                Column('cost', title=_('Cost'), data_type=currency, 
                       editable=True, width=90),
                Column('total', title=_('Total'), data_type=currency,
                       width=100)]

def _get_columns(self, *args):
        return [Column('payment_id', _('Number'), data_type=int, width=100,
                        format_func=self._get_payment_id, sorted=True),
                       # XXX Waiting for bug 2214
                       # format='%03d'),
                Column('due_date', _('Due Date'), 
                       data_type=datetime.date, width=120),
                Column('description', _('Description'), data_type=str, 
                       expand=True),
                ColoredColumn('value', _('Value'), data_type=currency, 
                              color='red', data_func=self._colorize,
                              width=120)]