public static im.turms.server.common.access.client.dto.model.file.ImageFile.Description getDefaultInstance() {
            return DEFAULT_INSTANCE;
        }
<code>optional int32 file_size = 4;</code>

@return This builder for chaining.
turms-server-common/src/main/java/im/turms/server/common/access/client/dto/model/file/ImageFile.java