combine_functions_into_class_start.kt

// Both functions print something
private fun printInvoiceHeader(header: InvoiceHeader) {
    binding.tvInvoicePreview.text = header.toString()
}

private fun printCustomerDetails(customer: Customer) {
    var customerDetails = ""
    customerDetails += "CUSTOMER\n"
    customerDetails += "First Name: ${customer.firstName}\nLast Name: ${customer.lastName}\n"
    binding.tvInvoicePreview.append("$customerDetails\n")
}