initializeApplePay static method
Implementation
static Future initializeApplePay(String applePayMerchantId) async {
assert(applePayMerchantId.isNotEmpty,
'applePayMerchantId should not be empty.');
var params = <String, dynamic>{
'merchantId': applePayMerchantId,
};
await _channel.invokeMethod('initializeApplePay', params);
}