shadowing callback remote_entity_shadowing_schema_property_verbatim_named() doesn't work for Field API fields

Ok, I mis-interpreted the docs. Instead of being a key on the entity-level properties map, shadowing can be specified via fedoraentity_entity_property_info_alter(). For example:

function mymodule_entity_property_info_alter(&$info) {
  if (!empty($info['fedoraentity'])) {
    $info['fedoraentity']['properties']['title']['remote property shadowing'] = array(
      'remote to local callback' => 'remote_entity_shadowing_schema_property_verbatim',
    );

    $info['fedoraentity']['properties']['description']['remote property shadowing'] = array(
      'remote to local callback' => 'remote_entity_shadowing_schema_property_verbatim_named',
      'local property' => 'field_dc_description',
    );
  }
}

This successfully populates the title and field_dc_description values into the first level of the entity array but it *doesn't* populate the default value of the field_dc_description (Field API field).

To be clear, after importing an entity from remote, with shadowing per #2 the data structure is:

Array
(
    [14] => Entity Object
        (
// snipped
        [eid] => 14
        [remote_id] => collection:501
        [type] => collection
        [entity_data] => stdClass Object
            (
                [title] => My remote entity
                [type] => collection
                [description] => Insert something here about the remote entity...
                [id] => collection:501
                [remote_id] => collection:501
            )

        [created] => 1421358274
        [changed] => 0
        [remote_saved] => 0
        [needs_remote_save] => 0
        [expires] => 0
        [deleted] => 0
        [title] => My remote entity
        [field_dc_description] => Insert something here about the remote entity...

The shadowing callback has pulled title and description from entity_data but written them to the first level of the entity object. That's ok for title, since title is declared as a local property. But it is no good for field_dc_description which is a Field API text field. I would have expected field_dc_description to look more like

[field_dc_description] => Array(
  [und] => Array(
    [0] => Array(
      'value' => 'Insert something here about the remote entity...'
    )
  )
)

The field_dc_description value is not visible on entity view or edit pages.

This is why I asked whether shadowing works for Field API fields...

Setting the incoming value on the entity wrapper rather than the entity directly works for properties and Field API fields.