public interface NullDataTypeAn empty/null data type marker interface for Visual Properties holding no actual data. Root Visual Properties have this data type.
To use this in your app, include the following dependency in your POM:
<dependency> <groupId>org.cytoscape</groupId> <artifactId>viewmodel-api</artifactId> </dependency>
Cytoscape Backwards Compatibility (API Interface): We expect that this interface will be used but not implemented by developers using this interface. As such, we reserve the right to add methods to the interface as part of minor version upgrades. We will not remove methods for any changes other than major version upgrades.