public Builder mergeFrom(
                im.turms.server.common.access.client.dto.model.conference.Meetings other) {
            if (other == im.turms.server.common.access.client.dto.model.conference.Meetings
                    .getDefaultInstance()) {
                return this;
            }
            if (meetingsBuilder_ == null) {
                if (!other.meetings_.isEmpty()) {
                    if (meetings_.isEmpty()) {
                        meetings_ = other.meetings_;
                        bitField0_ &= ~0x00000001;
                    } else {
                        ensureMeetingsIsMutable();
                        meetings_.addAll(other.meetings_);
                    }
                    onChanged();
                }
            } else {
                if (!other.meetings_.isEmpty()) {
                    if (meetingsBuilder_.isEmpty()) {
                        meetingsBuilder_.dispose();
                        meetingsBuilder_ = null;
                        meetings_ = other.meetings_;
                        bitField0_ &= ~0x00000001;
                        meetingsBuilder_ =
                                com.google.protobuf.GeneratedMessage.alwaysUseFieldBuilders
                                        ? getMeetingsFieldBuilder()
                                        : null;
                    } else {
                        meetingsBuilder_.addAllMessages(other.meetings_);
                    }
                }
            }
            this.mergeUnknownFields(other.getUnknownFields());
            onChanged();
            return this;
        }
Protobuf type {@code im.turms.proto.Meetings}
turms-server-common/src/main/java/im/turms/server/common/access/client/dto/model/conference/Meetings.java