virtual bool findFiles(String8 basePath, Vector<String8>& extensions,
KeyedVector<String8,time_t>& fileStore,
DirectoryWalker* dw) = 0;
virtual bool findFiles(String8 basePath, Vector<String8>& extensions,
KeyedVector<String8,time_t>& fileStore,
DirectoryWalker* dw) = 0;