public static im.turms.server.common.access.client.dto.model.file.ImageFile.Description parseFrom(
                byte[] data,
                com.google.protobuf.ExtensionRegistryLite extensionRegistry)
                throws com.google.protobuf.InvalidProtocolBufferException {
            return PARSER.parseFrom(data, extensionRegistry);
        }
<code>optional int32 file_size = 4;</code>

@return The fileSize.
turms-server-common/src/main/java/im/turms/server/common/access/client/dto/model/file/ImageFile.java