### Question:
Structure implements Named { public int getRootLevelMemberCount() { return members.size(); } Structure(final String name, final List<? extends StructureMember> members); @Override boolean equals(final Object obj); @Override String getName(); @SuppressWarnings("unchecked") T getRootLevelMember(final int index); int getRootLevelMemberCount(); @Override int hashCode(); @Override String toString();  }### Answer:
@Test public void testGetRootLevelMemberCount() { assertThat(structure.getRootLevelMemberCount()).isEqualTo(members.size()); }