Handle error of the optionDataSource with is connected to ListGridField

[aafros]

I have a following ds:

<DataSource
    tableName="discovery_profile"
    ID="discovery_profile_broadcast"
    dataSourceVersion="1"
    serverType="sql"
>
<fields>
        <field primaryKey="true" name="disc_id" type="sequence" sequenceName="s_discovery_profile" hidden="true"></field>
        <field name="disc_dmserver_id" type="number"  optionDataSource="dm_server" displayField="dm_name" valueField="dm_server_id" title="Server" required="true"></field>
    </fields>

This ds is connected to the following ListGrid

final ListGrid discoveryListGrid = new ListGrid() ;
discoveryListGrid.setDataFetchMode( FetchMode.BASIC );
discoveryListGrid.setDataSource( dataSource ); //the datasource is the one you can see on the top block : discovery_profile_broadcast

  final ListGridField dmServerField = new ListGridField("disc_dmserver_id",  "Server") );

discoveryListGrid.setFields(dmServerField );

final DSRequest requestProperties = new DSRequest();
        requestProperties.setWillHandleError(true);
        discoveryListGrid.fetchData(null, new DSCallback() {

            @Override
            public void execute(DSResponse response, Object data,
                    DSRequest request) {
                if( response.getStatus() != DSResponse.STATUS_SUCCESS ) {
                    System.out.println("Status " + response.getStatus());
                } else {
                    Record[] records = response.getData();
                    for ( Record record : records ) {

                        String setId = record.getAttribute("disc_dmserver_id");//The id is found
                       //can this value be mapped to any EXISTING values at the dmServerField ? Does it have the display value ?
                      //if there is no "display value" exists I want to display empty string instead of setId value....
                    }
                }
                
            }
            
        }, requestProperties);

Here's my problem the discovery_profile_broadcast works as expected and bring back the disc_dmserver_id , which is value field, but the OptionDataSource throws error and I'm interested to catch this error. How can I hook up to the ListGridField to get the errors or the error code if it was thrown ?
If it is impossible - how can I find if the dmServerField has valueMap for the value I got in the discovery_profile_broadcast ?

Al I want to display an empty string in the dmServerField if the optionDataSource returned the Status which is not STATUS_SUCCESS.

old client support: SmartClient Version: v9.0p_2014-04-23/PowerEdition Deployment (built 2014-04-23)

[Isomorphic]

Just add a CellFormatter that checks whether the display field is null and returns " " if so.