@java.lang.Override
        public java.lang.String getAttachmentIdStr() {
            return instance.getAttachmentIdStr();
        }
<code>optional string attachment_id_str = 2;</code>

@return The attachmentIdStr.
turms-client-kotlin/src/main/java/im/turms/client/model/proto/request/storage/UpdateMessageAttachmentInfoRequest.java