docs: public weka.core.Instances wekaInstances(Instances instances) {
          weka.core.Instances wekaInstances = wekaInstancesInformation(instances);
          //We assume that we have only one WekaInstanceInformation for SamoaToWekaInstanceConverter
          this.wekaInstanceInformation = wekaInstances;
          for (int i = 0; i < instances.numInstances(); i++) {
              wekaInstances.add(wekaInstance(instances.instance(i)));
          }
          return wekaInstances;
      }