fcmCertificateName property Null safety

String? fcmCertificateName
@JsonKey(name: 'KEY_FCM_CERTIFICATE_NAME'), final

FCM 推送证书,请在云信管理后台申请 海外客户使用

Implementation

@JsonKey(name: 'KEY_FCM_CERTIFICATE_NAME')
final String? fcmCertificateName;