private void writeContentsOfPluginTypes(StringWriter stringWriter)
        {
            _writer    = new TextReportWriter(3);
            _instances = new List <InstanceRef>();

            _writer.AddDivider('=');
            _writer.AddText("PluginType", "Name", "Description");

            foreach (IPluginTypeConfiguration pluginType in _graph.GetPluginTypes(null))
            {
                writePluginType(pluginType);
            }

            _writer.AddDivider('=');

            _writer.Write(stringWriter);
        }