Issue with state Filter in Recurly Java SDK

[karnick]

Bug Report: Issue with state Filter in Recurly Java SDK

Summary
The state filter in the listAccountInvoices API of the Recurly Java SDK (com.recurly.v3:api-client:5.4.0) does not work as expected. When attempting to use the state filter, the code fails to compile with the following error:

error: cannot find symbol
        queryParams.setState(Constants.InvoiceState);
                                      ^
  symbol:   variable InvoiceState
  location: class Constants

Steps to Reproduce

• Use the Recurly Java SDK version 5.4.0.
• Attempt to call the listAccountInvoices API with the state filter set to past_due.
• Compile and run the code.
• Code Example

import com.recurly.v3.Pager;
import com.recurly.v3.resources.Invoice;

public class RecurlyBugReportExample {
    public static void main(String[] args) {
        String apiKey = "your-api-key"; // Replace with your Recurly API key
        String accountCode = "test-account-code"; // Replace with a valid account code

        try (Client client = new Client(apiKey)) {
            // Attempt to use the state filter
            Pager<Invoice> invoices = client.listAccountInvoices(accountCode, "state=past_due");

            // Print the invoices
            invoices.forEach(invoice -> {
                System.out.println("Invoice ID: " + invoice.getId());
                System.out.println("State: " + invoice.getState());
            });
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

Expected Behavior
The listAccountInvoices API should return a list of invoices filtered by the state parameter (e.g., past_due).

Actual Behavior
The code fails to compile with the error:

        queryParams.setState(Constants.InvoiceState);
                                      ^
  symbol:   variable InvoiceState
  location: class Constants

Environment
SDK Version: com.recurly.v3:api-client:5.4.0
Java Version: OpenJDK 21
Operating System: macOS