public void setSignatureKeyFileName(String signatureKeyFileName) {
        this.signatureKeyFileName = signatureKeyFileName;
    }
@Test
    void testSignatureVerificationOptionIgnore() throws Exception {

        // encryptor is sending a PGP message with signature! Decryptor is ignoreing the signature
        decryptor.setSignatureVerificationOption(PGPKeyAccessDataFormat.SIGNATURE_VERIFICATION_OPTION_IGNORE);
        decryptor.setSignatureKeyUserids(null);
        decryptor.setSignatureKeyFileName(null); // no public keyring! --> no signature validation possible

        String payload = "Test Message";
        MockEndpoint mock = getMockEndpoint("mock:unencrypted");
        mock.expectedBodiesReceived(payload);
        template.sendBody("direct:subkey", payload);
        MockEndpoint.assertIsSatisfied(context);

    }