[#BloombergLP-balst-StackTraceFrame-isLibraryFileNameKnown]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/balst.adoc[balst]::xref:BloombergLP/balst/StackTraceFrame.adoc[StackTraceFrame]::isLibraryFileNameKnown
:relfileprefix: ../../../
:mrdocs:

Return `true` if the `libraryFileName` attribute of this object is not the "unknown" value for that attribute, and `false` otherwise.

== Synopsis

Declared in `<balst_stacktraceframe.h>`

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


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