code: public String readToText() {
          Charset charset = getCharset();
          try (InputStream in = body();
               Reader reader = new InputStreamReader(in, charset)) {
              return Readers.readAll(reader);
          } catch (IOException e) {
              throw new RequestsException(e);
          } finally {
              close();
          }
      }
docs: Read response body to string. return empty string if response has no body