lows you to define simple serialization and deserialization
methods for attribute types called transforms. You can specify that
you would like a transform to run for an attribute by providing the
transform name as the first argument to the <code>attr</code> method. Ember Data
supports attribute types of <code>string</code>, <code>number</code>, <code>boolean</code>, and <code>date</code>,
which coerce the value to the JavaScript type that matches its name.</p>
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