Slightly modified and updated version of Nat Pryce's Maybe.
'com.adamldavis:maybe:0.0.1'
<dependency>
<groupId>com.adamldavis</groupId>
<artifactId>maybe</artifactId>
<version>0.0.1</version>
</dependency>
<dependency org="com.adamldavis" name="maybe" rev="0.0.1"/>
"com.adamldavis", "maybe", "0.0.1"