<field name="journal_id" invisible="context.get('to_invoice', False)"/>
<field name="amount" sum="Total" invisible="context.get('to_invoice', False)"/>
<field name="product_id" on_change="on_change_unit_amount(product_id, unit_amount, company_id, product_uom_id, journal_id)" invisible="not context.get('to_invoice', False)"/>
<field name="journal_id" invisible="context.get('to_invoice', False)"/>
<field name="amount" sum="Total" invisible="context.get('to_invoice', False)"/>
<field name="product_id" on_change="on_change_unit_amount(product_id, unit_amount, company_id, product_uom_id, journal_id)" invisible="not context.get('to_invoice', False)"/>