mpesaStkpushQueryUrLTest top-level constant Null safety
Implementation
const String mpesaStkpushQueryUrLTest = 'https://sandbox.safaricom.co.ke/mpesa/stkpushquery/v1/query';
const String mpesaStkpushQueryUrLTest = 'https://sandbox.safaricom.co.ke/mpesa/stkpushquery/v1/query';