Iniital implementation of synthetic extensions for SAM-adapter functions (non-static only)

compiler/testData/diagnostics/tests/syntheticExtensions/javaProperties/OverrideGetterOnly.kt

@@ -0,0 +1,22 @@
+// FILE: KotlinFile.kt
+
+fun foo(o: JavaClass2) {
+    useString(o.something)
+    o.something = ""
+    o.setSomething(1)
+    o.something = <!CONSTANT_EXPECTED_TYPE_MISMATCH!>1<!> // we generate extension property for JavaClass2 with more specific type
+    o.something += "1"
+}
+
+fun useString(<!UNUSED_PARAMETER!>i<!>: String) {}
+
+// FILE: JavaClass1.java
+public class JavaClass1 {
+    public Object getSomething() { return null; }
+    public void setSomething(Object value) { }
+}
+
+// FILE: JavaClass2.java
+public class JavaClass2 extends JavaClass1 {
+    public String getSomething() { return ""; }
+}