@Override
public void addElement(
Lookup lookup, LookupElement element, LookupElementPresentation presentation) {
StatisticsWeigher.clearBaseStatisticsInfo(element);
final String invariant =
presentation.getItemText()
+ "###"
+ getTailTextOrSpace(presentation)
+ "###"
+ presentation.getTypeText();
element.putUserData(PRESENTATION_INVARIANT, invariant);
CompletionSorterImpl sorter = obtainSorter(element);
Classifier<LookupElement> classifier = myClassifiers.get(sorter);
if (classifier == null) {
myClassifiers.put(sorter, classifier = sorter.buildClassifier(new AlphaClassifier(lookup)));
}
classifier.addElement(element);
super.addElement(lookup, element, presentation);
}
@NotNull
private static String getTailTextOrSpace(LookupElementPresentation presentation) {
String tailText = presentation.getTailText();
return tailText == null || tailText.isEmpty() ? " " : tailText;
}