public Collection<ConstructorDeclaration> getConstructors() {
        ArrayList<ConstructorDeclaration> res =
            new ArrayList<ConstructorDeclaration>();
        for (Symbol s : getMembers(true)) {
            if (s.isConstructor()) {
                MethodSymbol m = (MethodSymbol) s;
                res.add((ConstructorDeclaration)
                        env.declMaker.getExecutableDeclaration(m));
            }
        }
        return res;
    }