text: 
  export default function onMapLayersSemiDiff(TopologyName,FirstFeaturelayername,FirstFeatureId,SecondFeaturelayername,SecondFeatureId){
      return { 
                  type : "SEMIDIFF",
                  TopologyName,
                  FirstFeaturelayername,
                  FirstFeatureId,
                  SecondFeaturelayername,
                  SecondFeatureId
              }
           
             
  }