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<b>Warning</b>:  session_start(): open(/var/lib/php/sessions/sess_6sm3hdjjhohrf4m92ut3d3deb3, O_RDWR) failed: No space left on device (28) in <b>/var/www/tb-usercake/models/config.php</b> on line <b>51</b><br />
<br />
<b>Warning</b>:  session_start(): Failed to read session data: files (path: /var/lib/php/sessions) in <b>/var/www/tb-usercake/models/config.php</b> on line <b>51</b><br />
static S joinStrings(S sep, O... strings) {
  ret joinStrings(sep, Arrays.asList(strings));
}

static S joinStrings(S sep, Iterable strings) {
  new StringBuilder buf;
  for (O o : unnull(strings)) { 
    S s = strOrNull(o);
    if (nempty(s)) {
      if (nempty(buf)) buf.append(sep);
      buf.append(s);
    }
  }
  ret str(buf);
}