[#wallet-CWalletTx-m_is_cache_empty]
= xref:wallet.adoc[wallet]::xref:wallet/CWalletTx.adoc[CWalletTx]::m&lowbar;is&lowbar;cache&lowbar;empty
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This flag is true if all m&lowbar;amounts caches are empty&period; This is particularly useful in places where MarkDirty is conditionally called and the condition can be expensive and thus can be skipped if the flag is true&period; See MarkDestinationsDirty&period;

== Synopsis

Declared in `&lt;wallet&sol;transaction&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
mutable
bool m&lowbar;is&lowbar;cache&lowbar;empty = &lcub;true&rcub;;
----


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