<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _make_item(model):
 """Makes an ``.epub.Item`` from a ``.models.Document`` or ``.models.Resource`` """

    item = Item(model.id, model.content, model.media_type)
    return item