[#BloombergLP-bdlc-FlatHashMap-at-0b]
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:mrdocs:

Return a reference providing non‐modifiable access to the mapped value associated with the specified `key` in this map, if such an entry exists; otherwise throw a `std::out_of_range` exception. Note that this method is not exception‐neutral.

== Synopsis

Declared in `<bdlc_flathashmap.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
VALUE const&
at(KEY const& key) const;
----


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