in javac-ast-extension/src/org/jetbrains/jps/javac/ast/JavacReferenceCollectorListener.java [315:322]
private Element getReferencedElement(Tree tree) {
final TreePath path = new TreePath(myUnitPath, tree);
if (myAtLeastJdk8) {
return myTreeUtil.getElement(path);
} else {
return getElementIfJdkUnder8(tree);
}
}