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API > API/Developer > API/Developer/DirectoryWatcher > API/Developer/DirectoryWatcher/IMatchRule
Description
Test to see if a file is applicable based on this rule. Returns true if so, false of not, or empty if the file doesn't match this rule.
| Name | IsFileApplicable |
| Type | function |
| Header File | /Engine/Source/Developer/DirectoryWatcher/Public/FileCacheUtilities.h |
| Include Path | #include "FileCacheUtilities.h" |
TOptional< bool > IsFileApplicable
(
const TCHAR * Filename
) const