AX / Dynamics 365 For Finance and Operations blog

In this example, DataEntityToExtend is the data entity and validateDelete and validateWrite are methods that can be wrapped in the data entity.

[ExtensionOf(tableStr(DataEntityToExtend))]
final class DataEntityToExtend_Extension
{
    public boolean validateDelete()
    {
        boolean ret;
        //...
        ret = next validateDelete();
        //...
        return ret;
    }

    public boolean validateWrite()
    {
        boolean ret;
        //...
        ret = next validateWrite();
        //...
        return ret;
    }
}