public void populateTypeTable(AstSymbolTable stable)
        {
            m_stable = new AstSymbolTable(stable);
            stable.addKid(m_stable);
            if (m_schemaText != null)
                {
                m_schemaText.populateTypeTable(m_stable);
                }
            if (m_expression != null)
                {
                m_expression.populateTypeTable(m_stable);
                }
        }