title: What is meaning of this line of code in Kotlin
body: <p>I am a little bit confused with this line of hello world kotr code written in Kotlin.</p>
  
  <pre><code>fun main(args: Array&lt;String&gt;): Unit = io.ktor.server.netty.EngineMain.main(args)
  </code></pre>
  
  <p>what is code is doing here in the above line?</p>
  
  <p>full code for reference</p>
  
  <pre><code>fun main(args: Array&lt;String&gt;): Unit = io.ktor.server.netty.EngineMain.main(args)
  
  @Suppress("unused") // Referenced in application.conf
  @kotlin.jvm.JvmOverloads
  fun Application.module(testing: Boolean = false) {
      val client = HttpClient(Apache) {
      }
  
      routing {
          get("/") {
              call.respondText("HELLO WORLD! from KTOR", contentType = ContentType.Text.Plain)
          }
       }
  }
  </code></pre>