for (Iterator it = critOids.iterator(); it.hasNext(); )
for (Iterator it = extensions.values().iterator(); it.hasNext(); )
  public boolean hasUnsupportedCriticalExtension()  {    for (Iterator it = critOids.iterator(); it.hasNext(); )      {        String oid = (String) it.next();        if (!oid.equals("2.5.29.15") && !oid.equals("2.5.29.17") &&            !oid.equals("2.5.29.18") && !oid.equals("2.5.29.19") &&            !oid.equals("2.5.29.37"))          return true;      }    return false;  }