if idx > 0 {
				buf.WriteByte(',')
			}
			buf.WriteString(signV4TrimAll(v))
		}
		buf.WriteByte('\n')
	}
	return buf.String()
}

// getSignedHeaders generate a string i.e alphabetically sorted, semicolon-separated list of lowercase request header names
func getSignedHeaders(signedHeaders http.Header) string {
	var headers []string
	for k := range signedHeaders {

  }

  private static class WithPublicConstants {
    public static final WithPublicConstants FIRST = new WithPublicConstants();

    // To test that we pick the first constant alphabetically
    @SuppressWarnings("unused")
    public static final WithPublicConstants SECOND = new WithPublicConstants();
  }

  private static class FirstConstantIsNull {
    // To test that null constant is ignored

  private static MediaType addKnownType(MediaType mediaType) {
    KNOWN_TYPES.put(mediaType, mediaType);
    return mediaType;
  }

  /*
   * The following constants are grouped by their type and ordered alphabetically by the constant
   * name within that type. The constant name should be a sensible identifier that is closest to the
   * "common name" of the media. This is often, but not necessarily the same as the subtype.
   *

## 0.40.0

* Add notes to docs about installing `python-multipart` when using forms. PR [#574](https://github.com/tiangolo/fastapi/pull/574) by [@sliptonic](https://github.com/sliptonic).
* Generate OpenAPI schemas in alphabetical order. PR [#554](https://github.com/tiangolo/fastapi/pull/554) by [@dmontagu](https://github.com/dmontagu).
* Add support for truncating docstrings from *path operation functions*.