There are several reasons for a function or closure not to have a body:

* It is an unintentional omission, and should be fixed to prevent unexpected behavior in production.
* It is not yet, or never will be, supported. In this case an exception should be thrown.
* The function is an intentionally-blank override. In this case a nested comment should explain the reason for the blank override.

== Noncompliant Code Example

----
func fun(p1:Int) {
}
----

== Compliant Solution

----
func fun(p1:Int) {
  var a = doSomething(p1)
  var threshold = 42
  if a > threshold {
    // ...
  }
}
----
or 

----
func fun(p1:Int) {
  // Intentionally unimplemented...
}
----