'select_enum' => [ '', 'Payable upon receipt', 'Net 0', 'Net 10', 'Net 15', 'Net 30', 'Net 45', 'Net 60' ],
},
+ {
+ 'key' => 'invoice_sections',
+ 'section' => 'billing',
+ 'description' => 'Split invoice into sections and label according to package type when enabled.',
+ 'type' => 'checkbox',
+ },
+
{
'key' => 'payment_receipt_email',
'section' => 'billing',