As a plugin developer you can use this plugin as dependency of your plugin by adding a dependency tag to your POM.
To add the latest version of this plugin as a maven dependency, use the following:
<dependency> <groupId>jp.ikedam.jenkins.plugins</groupId> <artifactId>scoring-load-balancer</artifactId> <version>120.v5cc1a_77f0c09</version> </dependency>