public function test_compareTo_bothInstantComparator()
 {
     $a = OffsetDateTime::of(2008, 6, 30, 11, 20, 40, 4, self::OFFSET_PTWO());
     $b = OffsetDateTime::of(2008, 6, 30, 10, 20, 40, 5, self::OFFSET_PONE());
     $this->assertEquals($a->compareTo($b), OffsetDateTime::compareInstant($a, $b), "for nano != nano, compareTo and timeLineOrder() should be the same");
 }