<dependency>
  <groupId>org.apache.maven</groupId>
  <artifactId>maven</artifactId>
  <version>3.3.9</version>
  <type>pom</type>
</dependency>

'org.apache.maven:maven:pom:3.3.9'

<dependency org="org.apache.maven" name="maven" rev="3.3.9">
  <artifact name="maven" type="pom" />
</dependency>

@Grapes(
@Grab(group='org.apache.maven', module='maven', version='3.3.9')
)

compile 'org.apache.maven:maven:3.3.9'

[org.apache.maven/maven "3.3.9"]

libraryDependencies += "org.apache.maven" % "maven" % "3.3.9"