pos/account_cash_invoice/wizard/cash_invoice_in.xml

<?xml version="1.0" encoding="UTF-8" ?>
<odoo>
    <record id="cash_invoice_in_form" model="ir.ui.view">
        <field name="name">cash_invoice_in_form</field>
        <field name="model">cash.invoice.in</field>
        <field name="type">form</field>
        <field name="arch" type="xml">
            <form string="Pay supplier invoice or customer refund">
                <group>
                    <field name="company_id" invisible="1"/>
                    <field name="journal_ids" invisible="1"/>
                    <field name="journal_count" invisible="1"/>
                    <field name="journal_id"
                           class="oe_inline"
                           domain="[('id', 'in', journal_ids[0][2])]"
                           options="{'no_create': True, 'no_open':True}"
                           attrs="{'invisible':[('journal_count', '&lt;', 2)]}"
                    />
                    <field name="invoice_id"
                           class="oe_inline"
                           domain="[('company_id', '=', company_id),
                           ('state', '=', 'open'),
                           ('currency_id', '=', currency_id),
                           ('type', 'in', ['in_invoice', 'out_refund'])]"
                           options="{'no_create': True, 'no_open':True}"
                    />
                    <label for="amount"/>
                    <div>
                        <field name="amount" class="oe_inline"/><field name="currency_id" class="oe_inline" groups="base.group_multi_currency"/>
                    </div>
                </group>
                <footer>
                    <button name="run" string="Pay invoice" type="object" class="btn-primary"/>
                    <button special="cancel" string="Cancel" class="btn-default"/>
                </footer>
            </form>
        </field>
    </record>

    <act_window
            id="action_cash_invoice_in_from_statement"
            name="Pay invoice"
            res_model="cash.invoice.in"
            src_model="account.bank.statement"
            view_mode="form"
            target="new"
            key2="client_action_multi"
        />
</odoo>