code: public Table file(File file) throws IOException {
  	String extension = Files.getFileExtension(file.getCanonicalPath());
  	DataReader<?> reader = registry.getReaderForExtension(extension);
  	return reader.read(new Source(file));
      }
docs: Reads the given file into a table using default options
  Uses converter specified based on given file extension
  Use {@link #usingOptions(ReadOptions) usingOptions} to use non-default options