docs: protected void setHeadersByAuthorizationPolicy(
              Message message,
              URI currentURI
      ) {
          Headers headers = new Headers(message);
          AuthorizationPolicy effectiveAuthPolicy = getEffectiveAuthPolicy(message);
          String authString = authSupplier.getAuthorization(effectiveAuthPolicy, currentURI, message, null);
          if (authString != null) {
              headers.setAuthorization(authString);
          }
  
          String proxyAuthString = proxyAuthSupplier.getAuthorization(proxyAuthorizationPolicy,
                                                                 currentURI, message, null);
          if (proxyAuthString != null) {
              headers.setProxyAuthorization(proxyAuthString);
          }
      }