AsByteSource(Charset charset) {
      this.charset = checkNotNull(charset);
    }

    @Override
    public CharSource asCharSource(Charset charset) {
      if (charset.equals(this.charset)) {
        return CharSource.this;
      }
      return super.asCharSource(charset);
    }

    @Override
    public InputStream openStream() throws IOException {

   * equivalent to providing the {@link StandardOpenOption#READ READ} option.
   */
  public static CharSource asCharSource(Path path, Charset charset, OpenOption... options) {
    return asByteSource(path, options).asCharSource(charset);
  }

  /**
   * Returns a view of the given {@code path} as a {@link CharSink} using the given {@code charset}.
   *

        // like following/not following symlinks.)
        return new AsCharSource(charset) {
          @SuppressWarnings("FilesLinesLeak") // the user needs to close it in this case
          @Override
          public Stream<String> lines() throws IOException {
            return Files.lines(path, charset);
          }
        };
      }

      return super.asCharSource(charset);
    }

    @Override