in discovery-kubernetes-api/src/main/scala/org/apache/pekko/discovery/kubernetes/Settings.scala [25:38]
def this(system: ExtendedActorSystem) = this(system.settings.config.getConfig("pekko.discovery.kubernetes-api"))
/**
* Copied from PekkoManagementSettings, which we don't depend on.
*/
private implicit class HasDefined(val config: Config) {
def hasDefined(key: String): Boolean =
config.hasPath(key) &&
config.getString(key).trim.nonEmpty &&
config.getString(key) != s"<$key>"
def optDefinedValue(key: String): Option[String] =
if (hasDefined(key)) Some(config.getString(key)) else None
}