public static im.turms.client.model.proto.model.file.File.Description getDefaultInstance() {
            return DEFAULT_INSTANCE;
        }
<code>optional string format = 3;</code>

@param value The bytes for format to set.
@return This builder for chaining.
turms-client-kotlin/src/main/java/im/turms/client/model/proto/model/file/File.java