http://stackoverflow.com/questions/36118235/function-definition-fun-vs-val

References.kt

final class com/github/vmironov/MainKt$main$first$1 extends kotlin/jvm/internal/FunctionReference  implements kotlin/jvm/functions/Function2  {
  // access flags 0x1041
  public synthetic bridge invoke(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
    ALOAD 0
    ALOAD 1
    CHECKCAST com/github/vmironov/A
    ALOAD 2
    CHECKCAST java/lang/Number
    INVOKEVIRTUAL java/lang/Number.intValue ()I
    INVOKEVIRTUAL com/github/vmironov/MainKt$main$first$1.invoke (Lcom/github/vmironov/A;I)I
    INVOKESTATIC java/lang/Integer.valueOf (I)Ljava/lang/Integer;
    ARETURN
    MAXSTACK = 3
    MAXLOCALS = 3

  // access flags 0x11
  public final invoke(Lcom/github/vmironov/A;I)I
    @Lorg/jetbrains/annotations/NotNull;() // invisible, parameter 0
   L0
    ALOAD 1
    LDC "p1"
    INVOKESTATIC kotlin/jvm/internal/Intrinsics.checkParameterIsNotNull (Ljava/lang/Object;Ljava/lang/String;)V
    ALOAD 1
    ILOAD 2
   L1
    LINENUMBER 8 L1
    INVOKEVIRTUAL com/github/vmironov/A.f (I)I
    IRETURN
   L2
    LOCALVARIABLE this Lcom/github/vmironov/MainKt$main$first$1; L0 L2 0
    LOCALVARIABLE p1 Lcom/github/vmironov/A; L0 L2 1
    LOCALVARIABLE p2 I L0 L2 2
    MAXSTACK = 2
    MAXLOCALS = 3

  // access flags 0x11
  public final getOwner()Lkotlin/reflect/KDeclarationContainer;
    LDC Lcom/github/vmironov/A;.class
    INVOKESTATIC kotlin/jvm/internal/Reflection.getOrCreateKotlinClass (Ljava/lang/Class;)Lkotlin/reflect/KClass;
    ARETURN
    MAXSTACK = 1
    MAXLOCALS = 1

  // access flags 0x11
  public final getName()Ljava/lang/String;
    LDC "f"
    ARETURN
    MAXSTACK = 1
    MAXLOCALS = 1

  // access flags 0x11
  public final getSignature()Ljava/lang/String;
    LDC "f(I)I"
    ARETURN
    MAXSTACK = 1
    MAXLOCALS = 1

  // access flags 0x0
  <init>()V
    ALOAD 0
    ICONST_2
    INVOKESPECIAL kotlin/jvm/internal/FunctionReference.<init> (I)V
    RETURN
    MAXSTACK = 2
    MAXLOCALS = 1

  // access flags 0x19
  public final static Lcom/github/vmironov/MainKt$main$first$1; INSTANCE

  // access flags 0x8
  static <clinit>()V
    NEW com/github/vmironov/MainKt$main$first$1
    DUP
    INVOKESPECIAL com/github/vmironov/MainKt$main$first$1.<init> ()V
    PUTSTATIC com/github/vmironov/MainKt$main$first$1.INSTANCE : Lcom/github/vmironov/MainKt$main$first$1;
    RETURN
    MAXSTACK = 2
    MAXLOCALS = 0

  @Lkotlin/Metadata;(mv={1, 1, 0}, bv={1, 0, 0}, k=3, d1={"\u0000\u0010\n\u0000\n\u0002\u0010\u0008\n\u0000\n\u0002\u0018\u0002\n\u0002\u0008\u0002\u0010\u0000\u001a\u00020\u00012\u0006\u0010\u0002\u001a\u00020\u00032\u0006\u0010\u0004\u001a\u00020\u0001\u00a2\u0006\u0002\u0008\u0005"}, d2={"<anonymous>", "", "p1", "Lcom/github/vmironov/A;", "p2", "invoke"})
  OUTERCLASS com/github/vmironov/MainKt main ([Ljava/lang/String;)V
  // access flags 0x18
  final static INNERCLASS com/github/vmironov/MainKt$main$first$1 null null
  // compiled from: Main.kt
}