Singleton

<dependency>
    <groupId>rubygems</groupId>
    <artifactId>singleton</artifactId>
    <version>0.1.1</version>
</dependency>

compile group: 'rubygems', name: 'singleton', version: '0.1.1'

compile 'rubygems:singleton:0.1.1'

libraryDependencies += "rubygems" % "singleton" % "0.1.1"

<dependency org="rubygems" name="singleton" rev="0.1.1"/>

@Grapes(
            @Grab(group='rubygems', module='singleton', version='0.1.1')
        )

[rubygems/singleton "0.1.1"]

'rubygems:singleton:jar:0.1.1'