private fun newConfig(item: String) = ConfigurationItem().also { it.section = item }

override fun initialized(params: InitializedParams?) {
    client.configuration(ConfigurationParams(listOf(
        newConfig("foo"),
        newConfig("bar")
    ))).get().let { // Blocking to ensure we are loaded before continuing
        // Note the boilerplate and inability to use a loop as well as the order requirement
        config.foo = it[0] as X
        config.bar = it[1] as Y
    }
}