private void setFormat(java.lang.String value) {
            java.lang.Class<?> valueClass = value.getClass();
            bitField0_ |= 0x00000002;
            format_ = value;
        }
<code>optional string format = 3;</code>

@param value The format to set.
turms-client-kotlin/src/main/java/im/turms/client/model/proto/model/file/File.java