@Test
public void getMembersByPrefix() {

    ObjectNode node = ObjectNode.objectNodeBuilder()
            .withMember("a.1", 1)
            .withMember("a.2", 2)
            .withMember("bee", 3)
            .build();
    assertThat(node.getMembersByPrefix("a.").keySet(), containsInAnyOrder("a.1", "a.2"));
    assertThat(node.getMembersByPrefix("b").keySet(), containsInAnyOrder("bee"));
    assertThat(node.getMembersByPrefix("bee").keySet(), containsInAnyOrder("bee"));
}