}
private Doc getParentDoc(Doc doc) {
if (doc instanceof MemberDoc) {
MemberDoc memberDoc = (MemberDoc) doc;
return memberDoc.containingClass();
} else if (doc instanceof ClassDoc) {
ClassDoc classDoc = (ClassDoc) doc;
Doc enclosingClass = classDoc.containingClass();
if (enclosingClass != null) {
return enclosingClass;