@Test
public void success_GeneratePrivateKey_2() {

    PrivateKey privateKey = PrivateKey.newInstance("ab4195d4123f0594e5341c45134c5938cc5913d34aa951234c5938cc2a6eb487");
    boolean isKey25519 = privateKey instanceof PrivateKeyEd25519;
    assertThat(isKey25519, is(true));
}