vertexLabel.getProperty(propertyName).ifPresent((PropertyColumn pc) -> idx.addProperty(pc));
vertexLabel.getProperty(propertyName).ifPresent((PropertyColumn pc) -> idx.addProperty(pc));
edgeLabel.getProperty(propertyName).ifPresent((PropertyColumn pc) -> idx.addProperty(pc));
edgeLabel.getProperty(propertyName).ifPresent((PropertyColumn pc) -> idx.addProperty(pc));