<dependency>
  <groupId>org.nalloc</groupId>
  <artifactId>optional_2.11</artifactId>
  <version>0.1.0</version>
</dependency>

implementation 'org.nalloc:optional_2.11:0.1.0'

implementation("org.nalloc:optional_2.11:0.1.0")

libraryDependencies += "org.nalloc" % "optional_2.11" % "0.1.0"

@Grapes(
  @Grab(group='org.nalloc', module='optional_2.11', version='0.1.0')
)

<dependency org="org.nalloc" name="optional_2.11" rev="0.1.0" />

[org.nalloc/optional_2.11 "0.1.0"]

'org.nalloc:optional_2.11:jar:0.1.0'