public static boolean isBlank(String value) {
    return value == null || value.isEmpty();
  }
@Test
  void isBlankInputNotNullOutputFalse() {
    // Arrange
    final String value = "AAAAAAAA";
    // Act
    final boolean retval = Util.isBlank(value);
    // Assert result
    assertThat(retval).isEqualTo(false);
  }