### Question:
AaiConnection { static String getRelationshipData(final Relationship relationship, final String relationshipDataKey) { if (relationship != null && relationship.getRelationshipData() != null) { for (final RelationshipData relationshipData : relationship.getRelationshipData()) { if (relationshipDataKey.equals(relationshipData.getRelationshipKey())) { return relationshipData.getRelationshipValue(); } } } return null; }  List<EsrSystemInfo> receiveVnfm(); String receiveGenericVnfId(final String href); String receiveVserverName(final String genericId);  }### Answer:
@Test public void testRelationshipData() { final Relationship relationship = new Relationship(); final RelationshipData data = new RelationshipData(); data.setRelationshipKey(KEY); data.setRelationshipValue(VALUE); relationship.getRelationshipData().add(data); final String value = AaiConnection.getRelationshipData(relationship, KEY); assertEquals(VALUE, value); }