<dependency>
  <groupId>org.webjars.npm</groupId>
  <artifactId>css-tree</artifactId>
  <version>2.3.1</version>
</dependency>

implementation 'org.webjars.npm:css-tree:2.3.1'

implementation("org.webjars.npm:css-tree:2.3.1")

libraryDependencies += "org.webjars.npm" % "css-tree" % "2.3.1"

@Grapes(
  @Grab(group='org.webjars.npm', module='css-tree', version='2.3.1')
)

<dependency org="org.webjars.npm" name="css-tree" rev="2.3.1" />

[org.webjars.npm/css-tree "2.3.1"]

'org.webjars.npm:css-tree:jar:2.3.1'