Sum Type is an annotation processor that makes it simple to emulate sum types in Java via visitors.
'com.madebyatomicrobot:sumtype-annotations:0.0.1'
<dependency>
<groupId>com.madebyatomicrobot</groupId>
<artifactId>sumtype-annotations</artifactId>
<version>0.0.1</version>
</dependency>
<dependency org="com.madebyatomicrobot" name="sumtype-annotations" rev="0.0.1"/>
"com.madebyatomicrobot", "sumtype-annotations", "0.0.1"