.put("X_WEBKIT_CSP_REPORT_ONLY", "X-WebKit-CSP-Report-Only")
            .buildOrThrow();
    ImmutableSet<String> uppercaseAcronyms =
        ImmutableSet.of(
            "CDN", "CH", "ID", "DNT", "DNS", "DPR", "ECT", "GPC", "HTTP2", "IP", "MD5", "P3P",
            "RTT", "TE", "UA", "UID", "URL", "WWW", "XSS");

    for (Field field : httpHeadersFields()) {
      assertThat(field.get(null))

  /**
   * The HTTP <a href="https://wicg.github.io/responsive-image-client-hints/#sec-ch-dpr">{@code
   * Sec-CH-DPR}</a> header field name.
   *
   * @since 32.0.0
   */
  public static final String SEC_CH_DPR = "Sec-CH-DPR";

  /**
   * The HTTP <a href="https://w3c.github.io/webappsec-fetch-metadata/">{@code Sec-Fetch-Dest}</a>
   * header field name.
   *