Revert "[light classes] drop old light classes and backend: iteration #1"

This reverts commit 3cb2df9360.

analysis/decompiled/light-classes-for-decompiled/src/org/jetbrains/kotlin/analysis/decompiled/light/classes/KtLightClassForDecompiledDeclaration.kt

@@ -1,7 +1,4 @@
-/*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
+// Copyright 2000-2021 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 
 package org.jetbrains.kotlin.analysis.decompiled.light.classes
 
@@ -26,7 +23,7 @@ import org.jetbrains.kotlin.load.java.structure.LightClassOriginKind
 import org.jetbrains.kotlin.psi.KtClassOrObject
 
 open class KtLightClassForDecompiledDeclaration(
-    clsDelegate: PsiClass,
+    override val clsDelegate: PsiClass,
     private val clsParent: PsiElement,
     private val file: KtClsFile,
     kotlinOrigin: KtClassOrObject?

analysis/decompiled/light-classes-for-decompiled/src/org/jetbrains/kotlin/analysis/decompiled/light/classes/KtLightClassForDecompiledDeclarationBase.kt

@@ -1,7 +1,4 @@
-/*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
+// Copyright 2000-2021 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 
 package org.jetbrains.kotlin.analysis.decompiled.light.classes
 
@@ -12,7 +9,7 @@ import org.jetbrains.kotlin.asJava.elements.KtLightElementBase
 import org.jetbrains.kotlin.psi.KtClassOrObject
 
 abstract class KtLightClassForDecompiledDeclarationBase(
-    val clsDelegate: PsiClass,
+    override val clsDelegate: PsiClass,
     clsParent: PsiElement,
     final override val kotlinOrigin: KtClassOrObject?
 ) : KtLightElementBase(clsParent), PsiClass, KtExtensibleLightClass

analysis/decompiled/light-classes-for-decompiled/src/org/jetbrains/kotlin/analysis/decompiled/light/classes/KtLightFieldForDecompiledDeclaration.kt

@@ -1,7 +1,4 @@
-/*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
+// Copyright 2000-2021 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 
 package org.jetbrains.kotlin.analysis.decompiled.light.classes
 
@@ -70,5 +67,7 @@ open class KtLightFieldForDecompiledDeclaration(
 
     override fun toString(): String = "${this.javaClass.simpleName} of $fldParent"
 
+    override val clsDelegate: PsiField = fldDelegate
+
     override fun isValid(): Boolean = parent.isValid
 }

analysis/decompiled/light-classes-for-decompiled/src/org/jetbrains/kotlin/analysis/decompiled/light/classes/KtLightMethodForDecompiledDeclaration.kt

@@ -1,7 +1,4 @@
-/*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
+// Copyright 2000-2021 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 
 package org.jetbrains.kotlin.analysis.decompiled.light.classes
 
@@ -100,6 +97,8 @@ class KtLightMethodForDecompiledDeclaration(
 
     override fun toString(): String = "${this.javaClass.simpleName} of $funParent"
 
+    override val clsDelegate: PsiMethod = funDelegate
+
     override fun isValid(): Boolean = parent.isValid
 }