Inherit KProperty interfaces from function types

To be able to write the following: listOfStrings.map(String::length)

core/runtime.jvm/src/kotlin/jvm/internal/MutablePropertyReference0.java

@@ -36,6 +36,11 @@ public class MutablePropertyReference0 extends MutablePropertyReference implemen
         ((KMutableProperty0) getReflected()).set(value);
     }
 
+    @Override
+    public Object invoke() {
+        return get();
+    }
+
     @Override
     public KProperty0.Getter getGetter() {
         return ((KMutableProperty0) getReflected()).getGetter();

core/runtime.jvm/src/kotlin/jvm/internal/MutablePropertyReference1.java

@@ -36,6 +36,11 @@ public class MutablePropertyReference1 extends MutablePropertyReference implemen
         ((KMutableProperty1) getReflected()).set(receiver, value);
     }
 
+    @Override
+    public Object invoke(Object receiver) {
+        return get(receiver);
+    }
+
     @Override
     public KProperty1.Getter getGetter() {
         return ((KMutableProperty1) getReflected()).getGetter();

core/runtime.jvm/src/kotlin/jvm/internal/MutablePropertyReference2.java

@@ -36,6 +36,11 @@ public class MutablePropertyReference2 extends MutablePropertyReference implemen
         ((KMutableProperty2) getReflected()).set(receiver1, receiver2, value);
     }
 
+    @Override
+    public Object invoke(Object receiver1, Object receiver2) {
+        return get(receiver1, receiver2);
+    }
+
     @Override
     public KProperty2.Getter getGetter() {
         return ((KMutableProperty2) getReflected()).getGetter();

core/runtime.jvm/src/kotlin/jvm/internal/PropertyReference0.java

@@ -30,6 +30,11 @@ public class PropertyReference0 extends PropertyReference implements KProperty0
         return ((KProperty0) getReflected()).get();
     }
 
+    @Override
+    public Object invoke() {
+        return get();
+    }
+
     @Override
     public KProperty0.Getter getGetter() {
         return ((KProperty0) getReflected()).getGetter();

core/runtime.jvm/src/kotlin/jvm/internal/PropertyReference1.java

@@ -30,6 +30,11 @@ public class PropertyReference1 extends PropertyReference implements KProperty1
         return ((KProperty1) getReflected()).get(receiver);
     }
 
+    @Override
+    public Object invoke(Object receiver) {
+        return get(receiver);
+    }
+
     @Override
     public KProperty1.Getter getGetter() {
         return ((KProperty1) getReflected()).getGetter();

core/runtime.jvm/src/kotlin/jvm/internal/PropertyReference2.java

@@ -30,6 +30,11 @@ public class PropertyReference2 extends PropertyReference implements KProperty2
         return ((KProperty2) getReflected()).get(receiver1, receiver2);
     }
 
+    @Override
+    public Object invoke(Object receiver1, Object receiver2) {
+        return get(receiver1, receiver2);
+    }
+
     @Override
     public KProperty2.Getter getGetter() {
         return ((KProperty2) getReflected()).getGetter();