Copy: Support top-level declarations

idea/testData/refactoring/copy/copyMultipleDeclarations/after/bar/test.kt

@@ -0,0 +1,26 @@
+package bar
+
+import foo.X
+
+class A {
+    init {
+        val a: A = A()
+        val x: X = X()
+        b()
+        c
+    }
+}
+
+fun b() {
+    val a: A = A()
+    val x: X = X()
+    b()
+    c
+}
+
+val c: Int get() {
+    val a: A = A()
+    val x: X = X()
+    b()
+    c
+}

idea/testData/refactoring/copy/copyMultipleDeclarations/after/foo/test.kt

@@ -0,0 +1,33 @@
+package foo
+
+class A {
+    init {
+        val a: A = A()
+        val x: X = X()
+        b()
+        c
+    }
+}
+
+class X {
+    init {
+        val a: A = A()
+        val x: X = X()
+        b()
+        c
+    }
+}
+
+fun b() {
+    val a: A = A()
+    val x: X = X()
+    b()
+    c
+}
+
+val c: Int get() {
+    val a: A = A()
+    val x: X = X()
+    b()
+    c
+}

idea/testData/refactoring/copy/copyMultipleDeclarations/before/foo/test.kt

@@ -0,0 +1,33 @@
+package foo
+
+class <caret>A {
+    init {
+        val a: A = A()
+        val x: X = X()
+        b()
+        c
+    }
+}
+
+class X {
+    init {
+        val a: A = A()
+        val x: X = X()
+        b()
+        c
+    }
+}
+
+fun <caret>b() {
+    val a: A = A()
+    val x: X = X()
+    b()
+    c
+}
+
+val <caret>c: Int get() {
+    val a: A = A()
+    val x: X = X()
+    b()
+    c
+}

idea/testData/refactoring/copy/copyMultipleDeclarations/copyMultipleDeclarations.test

@@ -0,0 +1,4 @@
+{
+  "mainFile": "foo/test.kt",
+  "targetPackage": "bar"
+}