### Question:
WebAuthn4jAuthenticator implements Authenticator { public void setRequiredActions(KeycloakSession session, RealmModel realm, UserModel user) { } WebAuthn4jAuthenticator(KeycloakSession session); void authenticate(AuthenticationFlowContext context); void action(AuthenticationFlowContext context); boolean requiresUser(); boolean configuredFor(KeycloakSession session, RealmModel realm, UserModel user); void setRequiredActions(KeycloakSession session, RealmModel realm, UserModel user); void close();  }### Answer:
@Test public void test_setRequiredActions() throws Exception { try { authenticator.setRequiredActions(session, mock(RealmModel.class), mock(UserModel.class)); } catch (Exception e) { Assert.fail(e.getMessage()); } }