// If SBMLElements.isEmpty => there is a syntax
// error in the SBMLDocument
// If parser == null => there is no parser for
// the namespace of this element
logger.warn("!!! event.isEndElement : there is a problem in your SBML file !!!!");
logger.warn("This should never happen, there is probably a problem with the parsers used." +
"\n Try to check if one needed parser is missing or if you are using a parser in development.");
}
} else {
// The initialized parsers map should be
// initialized as soon as there is a sbml node.