EDIT

import org.apache.log4j.Logger;

    private static final Logger logger = Logger.getLogger(ToManyRelatedEntitiesListSelect.class);

    //      TODO CdmBase has a reimplemented equals method, do we need to use the BeanContainer instead?

        // newValue is already converted, need to use the original value from the data source

     *

     * Handle the data binding of the sub fields. Sub-fields can either be composite editor fields

     * or 'simple' fields, usually select fields.

     * <p>

     * Composite editor fields allow editing the nested bean Items and must implement the

     * {@link NestedFieldGroup} interface. Simple fields are only instantiated in

     * {@link #newFieldInstance(Object)} where the value of the field is set. No further binding is needed

     * for these 'simple' fields.

     *

    /**

     * {@inheritDoc}

     * <p>

     * However, this class has no local fieldGroup but must delegate to the nested NestedFieldGroup

     * if there are any. This happens in {@link #nestFieldGroup(AbstractField)}.

     * <p>

     */

    @Override

    public FieldGroup getFieldGroup() {

        return null;

    }

    /**

     * This ToMany-CompositeCustomField has no own fields and this no local fieldGroup (see {@link #getFieldGroup()})

     * which allow changing data. Editing of the list items is delegated to

     * a list of sub-fields which are responsible for editing and committing the changes.

     * Therefore the <code>parentFieldGroup</code> is only stored in a local field so that it can

     * be passed to per item fields in {@link #nestFieldGroup}

     *

     * {@inheritDoc}

     */

    @Override

    public void registerParentFieldGroup(FieldGroup parent) {

        parentFieldGroup = parent;

    }