val headers =
      Headers.Builder()
        .add("Test-Instant", expected)
        .build()
    assertThat(headers["Test-Instant"]).isEqualTo("Thu, 01 Jan 1970 00:00:00 GMT")
    assertThat(headers.getInstant("Test-Instant")).isEqualTo(expected)
  }

  @Test fun setDate() {
    val expected = Date(1000)
    val headers =
      Headers.Builder()
        .add("testDate", Date(0L))
        .set("testDate", expected)

                return element;
            }
        } else {
            targetClass = classMetaData;
        }

        String value = targetClass.getConstants().get(parts[1]);
        if (value == null) {
            listener.warning(String.format("Field '%s' does not have any value", fieldName));
            Element element = document.createElement("NO-VALUE-FOR_FIELD");