stinct keys to be queried, and which can return statistics on the number of
 objects stored in the buckets for each key.</div>
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<th class="colFirst" scope="row"><a href="KeyValue.html" title="interface in com.googlecode.cqengine.index.support">KeyValue</a>&lt;A,&#8203;O&gt;</th>
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<div class="block">Provides access to a key-value pair.</div>
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<th class="colFirst" scope="row"><a href="SortedKeyStatisticsAttributeIndex.html" 