/**
  * @brief store a file
  *
  * @return string URI where file was stored
  */
 public function store(FileDescriptorInterface $descriptor)
 {
     $contents = $descriptor->contents();
     $path = $this->path($descriptor->name());
     file_put_contents($path, $contents);
     return $this->schema() . '://' . $path;
 }
 /**
  * @brief get the file descriptor
  *
  * @return FileDescriptorInterface
  */
 public function fileDescriptor(FileInterface $file)
 {
     $this->descriptor->setFile($file);
     return $this->descriptor;
 }