private com.google.protobuf.RepeatedFieldBuilder<im.turms.server.common.access.client.dto.model.message.MessageReactionGroup, im.turms.server.common.access.client.dto.model.message.MessageReactionGroup.Builder, im.turms.server.common.access.client.dto.model.message.MessageReactionGroupOrBuilder> getReactionGroupsFieldBuilder() {
            if (reactionGroupsBuilder_ == null) {
                reactionGroupsBuilder_ = new com.google.protobuf.RepeatedFieldBuilder<>(
                        reactionGroups_,
                        ((bitField0_ & 0x00000800) != 0),
                        getParentForChildren(),
                        isClean());
                reactionGroups_ = null;
            }
            return reactionGroupsBuilder_;
        }
<code>repeated .im.turms.proto.MessageReactionGroup reaction_groups = 12;</code>
turms-server-common/src/main/java/im/turms/server/common/access/client/dto/model/message/Message.java