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<h4>_value</h4>
<pre>protected&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> _value</pre>
<div class="block">Value for the path, for leaf nodes; usually null for branches.
 If both children and value exists, typically need to construct
 bogus value with empty String key.</div>
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