Proper enhancement for type parameters

compiler/testData/diagnostics/tests/j+k/types/arrayList.kt

@@ -0,0 +1,15 @@
+// FILE: k.kt
+
+trait ML<T> {
+    public fun foo(): MutableList<T>
+}
+
+class K : J<String>(), ML<String>
+
+// FILE: J.java
+
+import java.util.*;
+
+class J<T> extends ML<T> {
+    public List<T> foo() { return null; }
+}

compiler/testData/diagnostics/tests/j+k/types/arrayList.txt

@@ -0,0 +1,24 @@
+package
+
+public/*package*/ open class J</*0*/ T> : ML<T!> {
+    public/*package*/ constructor J</*0*/ T>()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ fun foo(): kotlin.MutableList<T!>
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+internal final class K : J<kotlin.String>, ML<kotlin.String> {
+    public constructor K()
+    public open override /*2*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*2*/ /*fake_override*/ fun foo(): kotlin.MutableList<kotlin.String>
+    public open override /*2*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*2*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+internal trait ML</*0*/ T> {
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public abstract fun foo(): kotlin.MutableList<T>
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}

compiler/testData/diagnostics/tests/j+k/types/typeParameter.kt

@@ -0,0 +1,11 @@
+// FILE: k.kt
+
+trait K {
+    fun <T> foo(t: T)
+}
+
+// FILE: J.java
+
+interface J extends K {
+    <T> void foo(T t);
+}

compiler/testData/diagnostics/tests/j+k/types/typeParameter.txt

@@ -0,0 +1,15 @@
+package
+
+public/*package*/ trait J : K {
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public abstract override /*1*/ fun </*0*/ T> foo(/*0*/ t: T): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+internal trait K {
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    internal abstract fun </*0*/ T> foo(/*0*/ t: T): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}