Method isDirectory

lib/hal/HalStorage.cpp:163–163

size_t HalFile::write(uint8_t b) { HAL_FILE_WRAPPED_CALL(write, b); }
bool HalFile::rename(const char* newPath) { HAL_FILE_WRAPPED_CALL(rename, newPath); }
bool HalFile::isDirectory() const { HAL_FILE_FORWARD_CALL(isDirectory, ); }  // already thread-safe, no need to wrap
void HalFile::rewindDirectory() { HAL_FILE_WRAPPED_CALL(rewindDirectory, ); }
bool HalFile::close() { HAL_FILE_WRAPPED_CALL(close, ); }
HalFile HalFile::openNextFile() {