public void add(AstBase n)
        {
            if (n instanceof AstDeclaration)
                {
                int i;
                AstDeclaration d = (AstDeclaration) n;
                for (i = 0; i < d.m_decls.size(); i++)
                    {
                    m_decls.add(d.m_decls.get(i));
                    }
                }
        }