static StringCounter getInstance(QvtOperationalEvaluationEnv env) {
env.getThisOfType(QvtOperationalStdLibrary.INSTANCE.getStdLibModule());
// FIXME - this way we have String counters in global only, should be done
// per Stdlib instance (every aggregated transformation)
StringCounter counters = (StringCounter) env.getContext().getSessionData().getValue(DATA_KEY);
if (counters == null) {
counters = new StringCounter();
env.getContext().getSessionData().setValue(DATA_KEY, counters);
}
return counters;
}
