public Builder mergeDescription(
                im.turms.server.common.access.client.dto.model.file.VideoFile.Description value) {
            if (descriptionBuilder_ == null) {
                if (((bitField0_ & 0x00000001) != 0)
                        && description_ != null
                        && description_ != im.turms.server.common.access.client.dto.model.file.VideoFile.Description
                                .getDefaultInstance()) {
                    getDescriptionBuilder().mergeFrom(value);
                } else {
                    description_ = value;
                }
            } else {
                descriptionBuilder_.mergeFrom(value);
            }
            if (description_ != null) {
                bitField0_ |= 0x00000001;
                onChanged();
            }
            return this;
        }
<code>optional .im.turms.proto.VideoFile.Description description = 1;</code>
turms-server-common/src/main/java/im/turms/server/common/access/client/dto/model/file/VideoFile.java