in javac-ast-extension/src/org/jetbrains/jps/javac/ast/JavacReferenceCollectorListener.java [181:187]
private void collectClassImports(Element baseImport, Map<JavacRef, Integer> collector, final JavacRef.ImportProperties importProps) {
for (Element element = baseImport;
element != null && element.getKind() != ElementKind.PACKAGE;
element = element.getEnclosingElement()) {
incrementOrAdd(collector, JavacRef.JavacElementRefBase.fromElement(null, element, null, myNameTableCache, importProps));
}
}