How to cast List or Data Container into table items

I have load the data in data container now I want set the value of data container into group table. I have set visibility of group table is false.

Hi Mira,

If you want your group table to display data loaded to some data container you should set data container to target group table - GroupTable :: Jmix Documentation

<data>
    <collection id="someDc" class="...">
        <loader id="someDl">
            <query>
                ...
            </query>
        </loader>
    </collection>
</data>
<layout>
    <groupTable id="groupTable" dataContainer="someDc" width="100%" >
        <columns>
            ...
        </columns>
    </groupTable>
</layout>

Group Table will render loaded data automatically.

Regards,
Ivan