* version 25. Please, use {@link #CONTENT_SECURITY_POLICY_REPORT_ONLY} to pass the CSP.
   *
   * @since 20.0
   */
  public static final String X_WEBKIT_CSP_REPORT_ONLY = "X-WebKit-CSP-Report-Only";

  /**
   * The HTTP <a href="https://wicg.github.io/cross-origin-embedder-policy/#COEP">{@code
   * Cross-Origin-Embedder-Policy}</a> header field name.
   *
   * @since 30.0