void write(Headers map, OutputStream os) throws IOException {
Set<Map.Entry<String, List<String>>> entries = map.entrySet();
for (Map.Entry<String, List<String>> entry : entries) {
String key = entry.getKey();
byte[] buf;
List<String> values = entry.getValue();
for (String val : values) {
int i = key.length();
buf = bytes(key, 2);
buf[i++] = ':';
buf[i++] = ' ';
os.write(buf, 0, i);
buf = bytes(val, 2);
i = val.length();
buf[i++] = '\r';
buf[i++] = '\n';
os.write(buf, 0, i);
}
}
os.write('\r');
os.write('\n');
}
