How to override Mixin class


I need to override a mixin class such as LotMixin.
So to add a new field , may I know how to do it?

I had attached below the code from LotMixin

class LotMixin:
    __slots__ = ()
    number = fields.Char(
        "Number", required=True,
            'required': ~Eval('has_sequence') | (Eval('id', -1) >= 0),
    product = fields.Many2One('product.product', 'Product', required=True)
    has_sequence = fields.Function(
        fields.Boolean("Has Sequence"), 'on_change_with_has_sequence')

You just register a new mixin that applies to all models that inherit from this mixin.