long l1 = System.currentTimeMillis();
long l2 = System.currentTimeMillis();;
try {
clearAllMessages();
qvtSyntaxAnalyser = new QvtSyntaxAnalyser(astModel, messageModel);
QvtLexicalAnalyser qvtLexicalAnalyser = new QvtLexicalAnalyser(inputStream);
Object result = qvtSyntaxAnalyser.parse(qvtLexicalAnalyser);
l2 = System.currentTimeMillis();
Qvtast2qvt transformation = new Qvtast2qvtExt(astModel, qvtModel, messageModel, primitiveTypes, oclStdLib, qvtStdLib, "", properties, logger);
transformation.transform();