public com.google.protobuf.ByteString getStringBytes() {
            java.lang.Object ref = "";
            if (kindCase_ == 2) {
                ref = kind_;
            }
            if (ref instanceof java.lang.String) {
                com.google.protobuf.ByteString b =
                        com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
                if (kindCase_ == 2) {
                    kind_ = b;
                }
                return b;
            } else {
                return (com.google.protobuf.ByteString) ref;
            }
        }
<code>string string = 2;</code>

@return The bytes for string.
turms-server-common/src/main/java/im/turms/server/common/access/client/dto/notification/TurmsNotification.java