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<b>Warning</b>:  session_start(): open(/var/lib/php/sessions/sess_v5ufku2tp9n4b7doqmm2uc5idh, 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 void web_check(Web web) {
  for (WebNode r : values(web.relations)) {
    if (!(r instanceof WebRelation))
      fail("Relation not a WebRelation: " + r);
    if (!web.nodes.contains(r))
      fail("Nodes list doesn't contain relation " + reverseLookup(web.relations, r));
  }
}