[#RPCArg-m_fallback]
= xref:RPCArg.adoc[RPCArg]::m&lowbar;fallback
:relfileprefix: ../
:mrdocs:

Default value or optionality of the argument&period;

== Synopsis

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

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
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xref:RPCArg/Fallback.adoc[Fallback] const m&lowbar;fallback;
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