public function dumpAllTables()
    {
        echo "<hr />Manager->dumpAllTables()<br />";
        foreach ($this as $id => $table) {
            if (!($table instanceof DataTable)) {
                echo "Error table $id is not instance of datatable<br />";
                var_export($table);
            } else {
                echo "<hr />";
                echo "Table (index=$id) TableId = " . $table->getId() . "<br />";
                echo $table;
                echo "<br />";
            }
        }
        echo "<br />-- End Manager->dumpAllTables()<hr />";
    }