private void setTargetGroupIndex(int value) {
        bitField0_ |= 0x00000001;
        targetGroupIndex_ = value;
    }
<code>optional int32 target_group_index = 2;</code>

@param value The targetGroupIndex to set.
turms-client-kotlin/src/main/java/im/turms/client/model/proto/request/user/relationship/DeleteRelationshipGroupRequest.java