code: function error(sMessage, oElement) {
  				sMessage = sMessage + serializeSingleElement(oElement);
  				Log.error(sMessage, sCaller, sXMLPreprocessor);
  				throw new Error(sCaller + ": " + sMessage);
  			}
docs: Throws an error with the given message, prefixing it with the caller identification
  (separated by a colon) and appending the serialization of the given XML DOM element.
  Additionally logs the message and serialization as error with caller identification
  as details.
  
  @param {string} sMessage
  an error message which must end with a space (and take into account that the
  serialized XML is appended)
  @param {Element} oElement
  the XML DOM element