private void ensureReactionGroupsIsMutable() {
            if ((bitField0_ & 0x00000800) == 0) {
                reactionGroups_ = new java.util.ArrayList<>(reactionGroups_);
                bitField0_ |= 0x00000800;
            }
        }
<code>optional int64 pre_message_id = 11;</code>

@return This builder for chaining.
turms-server-common/src/main/java/im/turms/server/common/access/client/dto/model/message/Message.java