<dependency>
  <groupId>io.projectreactor.addons</groupId>
  <artifactId>reactor-extra</artifactId>
  <version>3.4.8</version>
</dependency>

implementation 'io.projectreactor.addons:reactor-extra:3.4.8'

implementation("io.projectreactor.addons:reactor-extra:3.4.8")

libraryDependencies += "io.projectreactor.addons" % "reactor-extra" % "3.4.8"

@Grapes(
  @Grab(group='io.projectreactor.addons', module='reactor-extra', version='3.4.8')
)

<dependency org="io.projectreactor.addons" name="reactor-extra" rev="3.4.8" />

[io.projectreactor.addons/reactor-extra "3.4.8"]

'io.projectreactor.addons:reactor-extra:jar:3.4.8'