@NotNull
  public StatsRequestBuilder withBody(@NotNull String body, @NotNull String contentType, @NotNull Charset charset) {
    if (StatisticsStringUtil.isEmptyOrSpaces(body)) {
      throw new EmptyHttpRequestBody();
    }
    myContent = body;
    myContentType = contentType;
    myCharset = charset;
    return this;
  }
@NotNull
  public StatsRequestBuilder withBody(@NotNull String body, @NotNull String contentType, @NotNull Charset charset)