[#BloombergLP-bdlc-FlatHashTable_GroupControl-2constructor]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlc.adoc[bdlc]::xref:BloombergLP/bdlc/FlatHashTable_GroupControl.adoc[FlatHashTable_GroupControl]::FlatHashTable_GroupControl
:relfileprefix: ../../../
:mrdocs:

Create a group control query object using the specified `data`.

== Synopsis

Declared in `<bdlc_flathashtable_groupcontrol.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
explicit
FlatHashTable_GroupControl(uint8_t const* data);
----

== Description

The bytes of `data` have no alignment requirement. The behavior is undefined unless `data` has at least `k_SIZE` bytes available.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *data*
| control‐byte group of at least `k_SIZE` bytes
|===


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