<dependency>
  <groupId>io.github.astrapi69</groupId>
  <artifactId>observer</artifactId>
  <version>6</version>
</dependency>

implementation 'io.github.astrapi69:observer:6'

implementation("io.github.astrapi69:observer:6")

libraryDependencies += "io.github.astrapi69" % "observer" % "6"

@Grapes(
  @Grab(group='io.github.astrapi69', module='observer', version='6')
)

<dependency org="io.github.astrapi69" name="observer" rev="6" />

[io.github.astrapi69/observer "6"]

'io.github.astrapi69:observer:jar:6'