Can not define a list as a subordinate element of a choice

The yang model is like：

choice darknessFactor {

case knessFactorA{
list darknessFactorAList {
key "key-id";
leaf key-id

{ type uint32; config true; description "The key id"; }

}
}
case knessFactorB{
leaf FactorBName

{ type uint32; config true; description "The darkness factor."; }

}
}

When we define a list as a subordinate element of a choice,and register it in datachange service. When we invoke change.getCreatedData() in onDataChanged method it whill throw java.lang.NullPointerException：

We think in method yangPathArgumentChild of org.opendaylight.yangtools.binding.data.codec.impl.ChoiceNodeCodecContext.java should add
if(arg instanceof NodeIdentifierWithPredicates)

{ cazeProto = byYangCaseChild.get(new NodeIdentifier(arg.getNodeType())); }