Yinan Zhang 7fc6b1b259 Add buffered writer
The buffered writer adopts a signature identical to `write_cb`,
so that it can be plugged into anywhere `write_cb` appears.
2019-08-09 09:44:29 -07:00
..
2018-11-14 08:44:05 -08:00
2018-11-14 08:44:05 -08:00
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2019-08-09 09:44:29 -07:00