[#BloombergLP-bdlc-FlatHashTable_GroupControl-2constructor]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlc.adoc[bdlc]::xref:BloombergLP/bdlc/FlatHashTable_GroupControl.adoc[FlatHashTable&lowbar;GroupControl]::FlatHashTable&lowbar;GroupControl
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:mrdocs:

Create a group control query object using the specified `data`&period; The bytes of `data` have no alignment requirement&period; The behavior is undefined unless `data` has at least `k&lowbar;SIZE` bytes available&period;

== Synopsis

Declared in `&lt;bdlc&lowbar;flathashtable&lowbar;groupcontrol&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
explicit
FlatHashTable&lowbar;GroupControl(uint8&lowbar;t const* data);
----


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