graphdb/titan0/src/main/java/org/apache/atlas/repository/graphdb/titan0/Titan0GraphManagement.java [96:129]:
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    @Override
    public AtlasPropertyKey makePropertyKey(String propertyName, Class propertyClass, AtlasCardinality cardinality) {

        if (cardinality.isMany()) {
            newMultProperties.add(propertyName);
        }

        PropertyKeyMaker propertyKeyBuilder = management.makePropertyKey(propertyName).dataType(propertyClass);

        if (cardinality != null) {
            Cardinality titanCardinality = TitanObjectFactory.createCardinality(cardinality);
            propertyKeyBuilder.cardinality(titanCardinality);
        }
        PropertyKey propertyKey = propertyKeyBuilder.make();
        return GraphDbObjectFactory.createPropertyKey(propertyKey);
    }

    @Override
    public void deletePropertyKey(String propertyKey) {
        PropertyKey titanPropertyKey = management.getPropertyKey(propertyKey);

        if (null == titanPropertyKey) return;

        for (int i = 0;; i++) {
            String deletedKeyName = titanPropertyKey + "_deleted_" + i;
            if (null == management.getPropertyKey(deletedKeyName)) {
                management.changeName(titanPropertyKey, deletedKeyName);
                break;
            }
        }
    }

    @Override
    public AtlasPropertyKey getPropertyKey(String propertyName) {
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graphdb/titan1/src/main/java/org/apache/atlas/repository/graphdb/titan1/Titan1GraphManagement.java [122:153]:
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    @Override
    public AtlasPropertyKey makePropertyKey(String propertyName, Class propertyClass, AtlasCardinality cardinality) {

        if (cardinality.isMany()) {
            newMultProperties.add(propertyName);
        }
        PropertyKeyMaker propertyKeyBuilder = management.makePropertyKey(propertyName).dataType(propertyClass);
        if (cardinality != null) {
            Cardinality titanCardinality = TitanObjectFactory.createCardinality(cardinality);
            propertyKeyBuilder.cardinality(titanCardinality);
        }
        PropertyKey propertyKey = propertyKeyBuilder.make();
        return GraphDbObjectFactory.createPropertyKey(propertyKey);
    }

    @Override
    public void deletePropertyKey(String propertyKey) {
        PropertyKey titanPropertyKey = management.getPropertyKey(propertyKey);

        if (null == titanPropertyKey) return;

        for (int i = 0;; i++) {
            String deletedKeyName = titanPropertyKey + "_deleted_" + i;
            if (null == management.getPropertyKey(deletedKeyName)) {
                management.changeName(titanPropertyKey, deletedKeyName);
                break;
            }
        }
    }

    @Override
    public AtlasPropertyKey getPropertyKey(String propertyName) {
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