all feature tvalues have occurence set to 1

converter-sbml/src/main/java/lcsb/mapviewer/converter/model/sbml/species/SbmlSpeciesExporter.java

@@ -218,6 +218,7 @@ public class SbmlSpeciesExporter extends SbmlElementExporter<Species, org.sbml.j
       feature = new SpeciesFeatureType();
       feature.setName(featureName);
       feature.setId(featureId);
+      feature.setOccur(1);
       speciesType.getListOfSpeciesFeatureTypes().add(feature);
     }
     return feature;
@@ -247,6 +248,7 @@ public class SbmlSpeciesExporter extends SbmlElementExporter<Species, org.sbml.j
     if (feature == null) {
       feature = multiExtension.createSpeciesFeature();
       feature.setSpeciesFeatureType(fetureType.getId());
+      feature.setOccur(1);
     }
     SpeciesFeatureValue value = new SpeciesFeatureValue();
     value.setValue(possibleValue.getId());
@@ -462,6 +464,7 @@ public class SbmlSpeciesExporter extends SbmlElementExporter<Species, org.sbml.j
       feature = new SpeciesFeatureType();
       feature.setName(bioEntityFeature.getFeatureName());
       feature.setId(MultiPackageNamingUtils.getFeatureId(clazz, bioEntityFeature));
+      feature.setOccur(1);
       if (bioEntityFeature.getDefaultValue() != null) {
         addPosibleValueToFeature(feature, bioEntityFeature.getDefaultValue());
       }