36                   const FilesystemInterface* fs,  in WriteBlockMap()  argument
39   if (!fs->GetFiles(&files)) {  in WriteBlockMap()
112   std::unique_ptr<FilesystemInterface> fs;  in Main()  local
114   fs = SquashfsFilesystem::CreateFromFile(img, true);  in Main()
115   if (fs != nullptr) {  in Main()
116     return WriteBlockMap(img, fs.get(), output_file);  in Main()
118   fs = ErofsFilesystem::CreateFromFile(img);  in Main()
119   if (fs != nullptr) {  in Main()
120     return WriteBlockMap(img, fs.get(), output_file);  in Main()
122   fs = Ext2Filesystem::CreateFromFile(img);  in Main()
123   if (fs != nullptr) {  in Main()
124     return WriteBlockMap(img, fs.get(), output_file);  in Main()