The definition of the field is
```python
bank_ids = fields.One2many('res.partner.bank', 'company_id', string='Bank Accounts', help='Bank accounts related to this company')
```
So all the banks of all partners registered for one company.
closes odoo/odoo#73329
X-original-commit: 6c2ac88e843fb3b77e78e5fe52bd17b98bf7417e
Signed-off-by: oco-odoo <oco-odoo@users.noreply.github.com>
Signed-off-by: William André (wan) <wan@odoo.com>