public Builder setGroupIndex(int value) {

            groupIndex_ = value;
            bitField0_ |= 0x00000004;
            onChanged();
            return this;
        }
<code>optional int32 group_index = 3;</code>

@param value The groupIndex to set.
@return This builder for chaining.
turms-server-common/src/main/java/im/turms/server/common/access/client/dto/request/user/relationship/CreateRelationshipRequest.java