<dependency>
  <groupId>org.webjars.npm</groupId>
  <artifactId>flag-icons</artifactId>
  <version>7.2.1</version>
</dependency>

implementation 'org.webjars.npm:flag-icons:7.2.1'

implementation("org.webjars.npm:flag-icons:7.2.1")

libraryDependencies += "org.webjars.npm" % "flag-icons" % "7.2.1"

@Grapes(
  @Grab(group='org.webjars.npm', module='flag-icons', version='7.2.1')
)

<dependency org="org.webjars.npm" name="flag-icons" rev="7.2.1" />

[org.webjars.npm/flag-icons "7.2.1"]

'org.webjars.npm:flag-icons:jar:7.2.1'