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Return a `Datum` map value holding the elements supplied to `pushBack` or `append`&period; The caller is responsible for releasing the resources of the returned `Datum` object&period; Calling this method indicates that the caller is finished building the `Datum` map and no further values shall be appended&period; The behavior is undefined if any method of this object, other than its destructor, is called after `commit` invocation&period;

== Synopsis

Declared in `&lt;bdld&lowbar;datummapbuilder&period;h&gt;`

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xref:BloombergLP/bdld/Datum.adoc[Datum]
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