n enumeration of all types of frame collections.
Added for faster type detection with less usage of casting.</p></div><h3 class="section">Values</h3><div class="fields"><div class="field"><h3><code><a name="IMAGE" href="#IMAGE"><span class="identifier">IMAGE</span></a></code></h3><div class="doc"><p></p></div></div><div class="field"><h3><code><a name="TILES" href="#TILES"><span class="identifier">TILES</span></a></code></h3><div class="doc"><p></p></div></div><div class="field"><h3><code><a name="ATLAS" hr