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<table><trclass='module-item'><td><aclass="struct"href="struct.Counter.html"title='abstutil::collections::Counter struct'>Counter</a></td><tdclass='docblock-short'></td></tr><trclass='module-item'><td><aclass="struct"href="struct.FixedMap.html"title='abstutil::collections::FixedMap struct'>FixedMap</a></td><tdclass='docblock-short'><p>A drop-in replacement for <code>BTreeMap</code>, where the keys have the property of being array indices.
Some values may be missing. Much more efficient at operations on individual objects, because
it just becomes a simple array lookup.</p>
</td></tr><trclass='module-item'><td><aclass="struct"href="struct.MultiMap.html"title='abstutil::collections::MultiMap struct'>MultiMap</a></td><tdclass='docblock-short'></td></tr><trclass='module-item'><td><aclass="struct"href="struct.Tags.html"title='abstutil::collections::Tags struct'>Tags</a></td><tdclass='docblock-short'><p>Convenience functions around a string->string map</p>
</td></tr><trclass='module-item'><td><aclass="struct"href="struct.VecMap.html"title='abstutil::collections::VecMap struct'>VecMap</a></td><tdclass='docblock-short'><p>Use when your key is just PartialEq, not Ord or Hash.</p>
<table><trclass='module-item'><td><aclass="trait"href="trait.IndexableKey.html"title='abstutil::collections::IndexableKey trait'>IndexableKey</a></td><tdclass='docblock-short'><p>Use with <code>FixedMap</code>. From a particular key, extract a <code>usize</code>. These values should be
roughly contiguous; the space used by the <code>FixedMap</code> will be <code>O(n)</code> with respect to the largest
