foundation/org.eclipse.persistence.core/src/test/resources/org/eclipse/persistence/testing/oxm/mappings/compositecollection/identifiedbyname/withgroupingelement/CompositeCollectionNullElement.json

{"employee": {
    "id":123,
    "email-addresses":{
       "email-address":[
          {
          "user-id":"jane.doe",
           "domain":"example.com"
           },
       {
            "user-id":"jdoe",
           "domain":"test.com"
           }
         ]
     },
     "mailing-addresses":{"mailing-address":[]}

     }
}