Idempotent print issue: TypeReference on destruct is lost.

[traceyyoshima]

              fun f(m: Map<Any, Any>): String {
                  return m.map { ( k, v ): Map.Entry<Any, Any> -> "$k: $v"}.toString()
              }

[kunli2]

This is a more generic test case, Seems we don't have a proper LST model for this

fun f(m: Map<String, Int>): String {
    return m.map { ( k : String, v : Int) : Map.Entry<String, Int> -> "$k: $v"}.toString()
}

{ ( k : String, v : Int) : Map.Entry<String, Int> -> "$k: $v"} is a J.Lambda.
( k : String, v : Int) : Map.Entry<String, Int> should be a J.Lambda.Parameters, my understanding is
( k : String, v : Int) can fit into a J.Lambda.Parameters with the following values
- 1. J.Lambda.Parameters#parenthesized = true
- 2. J.Lambda.Parameters#parameters (type : List<JRightPadded<J>>) is a list of J.VaraibleDeclarations, has two elements: k : String and v : Int.
However, I didn't find a proper place for Map.Entry<String, Int>.

@knutwannheden and @traceyyoshima , what do you think about the solution for this?