code: public static ProxyCertInfo getProxyCertInfo(X509Extension ext)
  	throws IOException {
  	return ProxyCertInfo.getInstance(BouncyCastleUtil.getExtensionObject(ext));
      }
docs: Creates a <code>ProxyCertInfo</code> object from given
  extension.
  
  @param ext the extension.
  @return the <code>ProxyCertInfo</code> object.
  @exception IOException if something fails.