[#BloombergLP-bdljsn-JsonObject-operator_subs-0bc]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdljsn.adoc[bdljsn]::xref:BloombergLP/bdljsn/JsonObject.adoc[JsonObject]::operator&lsqb;&rsqb;
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Return a reference providing modifiable access to the `Json` object associated with the specified `key` in this `JsonObject`&semi; if this `JsonObject` does not already contain a `Json` object associated with `key`, first insert a new default&hyphen;constructed `Json` object associated with `key`&period; The behavior is undefined unless `key` is valid UTF&hyphen;8 (see `bdlde&colon;&colon;Utf8Util&colon;&colon;isValid`)&period;

== Synopsis

Declared in `&lt;bdljsn&lowbar;json&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:BloombergLP/bdljsn/Json.adoc[Json]&
operator&lsqb;&rsqb;(std::string&lowbar;view const& key);
----


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