data structure of the map or channel.
</li>
</ul>

<p>
An interface value may be self-contained or contain references to underlying data
depending on the interface's <a href="#Variables">dynamic type</a>.
The predeclared identifier <code>nil</code> is the zero value for types whose values
can contain references.
</p>

<p>
When multiple values share underlying data, changing one value may change another.

   * Highly specific magic matches get a high priority
   * General magic matches which could trigger a false-positive need
     a low one
   * The priority for containers normally need to be higher than for
     the things they contain, so they don't accidently get detected
     as what's in them
   * For logic too complex to be expressed in a magic match, do the best
     you can here, then provide a Custom Detector for the rest
-->