<dependency>
  <groupId>org.json4s</groupId>
  <artifactId>json4s-ast_2.12</artifactId>
  <version>4.1.0-M6</version>
</dependency>

implementation 'org.json4s:json4s-ast_2.12:4.1.0-M6'

implementation("org.json4s:json4s-ast_2.12:4.1.0-M6")

libraryDependencies += "org.json4s" % "json4s-ast_2.12" % "4.1.0-M6"

@Grapes(
  @Grab(group='org.json4s', module='json4s-ast_2.12', version='4.1.0-M6')
)

<dependency org="org.json4s" name="json4s-ast_2.12" rev="4.1.0-M6" />

[org.json4s/json4s-ast_2.12 "4.1.0-M6"]

'org.json4s:json4s-ast_2.12:jar:4.1.0-M6'