<dependency>
  <groupId>com.willowtreeapps.assertk</groupId>
  <artifactId>assertk</artifactId>
  <version>0.25</version>
</dependency>

implementation 'com.willowtreeapps.assertk:assertk:0.25'

implementation("com.willowtreeapps.assertk:assertk:0.25")

libraryDependencies += "com.willowtreeapps.assertk" % "assertk" % "0.25"

@Grapes(
  @Grab(group='com.willowtreeapps.assertk', module='assertk', version='0.25')
)

<dependency org="com.willowtreeapps.assertk" name="assertk" rev="0.25" />

[com.willowtreeapps.assertk/assertk "0.25"]

'com.willowtreeapps.assertk:assertk:jar:0.25'