<dependency>
  <groupId>org.xbib.elasticsearch</groupId>
  <artifactId>log4j</artifactId>
  <version>6.3.2.1</version>
</dependency>

implementation 'org.xbib.elasticsearch:log4j:6.3.2.1'

implementation("org.xbib.elasticsearch:log4j:6.3.2.1")

libraryDependencies += "org.xbib.elasticsearch" % "log4j" % "6.3.2.1"

@Grapes(
  @Grab(group='org.xbib.elasticsearch', module='log4j', version='6.3.2.1')
)

<dependency org="org.xbib.elasticsearch" name="log4j" rev="6.3.2.1" />

[org.xbib.elasticsearch/log4j "6.3.2.1"]

'org.xbib.elasticsearch:log4j:jar:6.3.2.1'