ned string and numeric
    types.</li>
      <li>Only 1-to-1 and 1-to-many relationships between entities are supported.</li>
      <li>The framework handles creating, modifying, and deleting rows
    in the underlying Amazon DynamoDB tables, but it does not manage the tables
    themselves. You must create tables using primitives provided by
    the AWS SDK for iOS or via the AWS Management Console.</li>
      <li>When fetching objects without a predicate, the framework
    will potentially do mult