return CharSource.this;
      }
      return super.asCharSource(charset);
    }

    @Override
    public InputStream openStream() throws IOException {
      return new ReaderInputStream(CharSource.this.openStream(), charset, 8192);
    }

    @Override
    public String toString() {
      return CharSource.this.toString() + ".asByteSource(" + charset + ")";
    }
  }