signatures.add(method.getOverrideSignature());
                }
            }
        }

        for (ClassDoc supertype : classDoc.getSuperTypes()) {
            for (MethodDoc method: supertype.getClassMethods()){
                if (signatures.add(method.getMetaData().getOverrideSignature())) {
                    classDoc.addClassMethod(method);
                }
            }
        }
    }