<dependency>
  <groupId>at.stefangeyer.challonge.rest</groupId>
  <artifactId>retrofit</artifactId>
  <version>2.1.0</version>
</dependency>

implementation 'at.stefangeyer.challonge.rest:retrofit:2.1.0'

implementation("at.stefangeyer.challonge.rest:retrofit:2.1.0")

libraryDependencies += "at.stefangeyer.challonge.rest" % "retrofit" % "2.1.0"

@Grapes(
  @Grab(group='at.stefangeyer.challonge.rest', module='retrofit', version='2.1.0')
)

<dependency org="at.stefangeyer.challonge.rest" name="retrofit" rev="2.1.0" />

[at.stefangeyer.challonge.rest/retrofit "2.1.0"]

'at.stefangeyer.challonge.rest:retrofit:jar:2.1.0'