code: public Entry getMetadata(String path, String hash) {
          return getMetadata(path, FILE_LIMIT, hash, true);
      }
docs: Returns metadata information about specified resource with
  checking for its hash. If nothing changes (hash isn't changed)
  then 304 will returns.
  
  @param path to file or directory
  @param hash to check smth changed
  
  @return metadata of specified resource
  
  @see Entry