@HighFrequencyInvocation
    public Optional<ShardingSpherePrivileges> findPrivileges(final Grantee grantee) {
        return privileges.keySet().stream().filter(each -> each.accept(grantee)).findFirst().map(privileges::get);
    }
@Test
    void assertFindPrivileges() {
        assertTrue(createAuthorityRule().findPrivileges(new Grantee("admin", "localhost")).isPresent());
    }