[#RPCArg-IsOptional]
= xref:RPCArg.adoc[RPCArg]::IsOptional
:relfileprefix: ../
:mrdocs:

Report whether the argument may be omitted&period;

== Synopsis

Declared in `&lt;rpc&sol;util&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
bool
IsOptional() const;
----

== Return Value

True if the argument is optional&period;


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