[#absl-btree_map-operator_subs-0e]
= xref:absl.adoc[absl]::xref:absl/btree_map.adoc[btree&lowbar;map]::operator&lsqb;&rsqb;
:relfileprefix: ../../
:mrdocs:

== Synopsis

Declared in `&lt;absl&sol;container&sol;btree&lowbar;map&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template&lt;
    class K = key&lowbar;type,
    int = EnableIf&lt;LifetimeBoundK&lt;K, false&gt;&gt;()&gt;
mapped&lowbar;type&
operator&lsqb;&rsqb;(key&lowbar;arg&lt;K&gt; const& k);
----


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