Mastering refactoring - Change function declaration, final code

change_function_declaration_end.kt

private fun printInvoiceSheet(invoice: Invoice) {
    printInvoiceHeader(invoiceNumber = invoice.number, invoiceDate = invoice.date)
    printInvoiceItemsSection(invoice.items, 22.0)
}

private fun printInvoiceHeader(invoiceNumber: Int, invoiceDate: LocalDate) {
    val invoiceHeader = "INVOICE N° ${invoiceNumber}, ${invoiceDate}\n\n"
    binding.tvInvoicePreview.text = invoiceHeader
}