Fix searching serialized classes package contains multiple fragments

js/js.translator/testData/box/incremental/classReferencingClass.kt

@@ -0,0 +1,25 @@
+// EXPECTED_REACHABLE_NODES: 1002
+// FILE: A.kt
+
+open class A {
+    open fun f(): Int = 1
+}
+
+// FILE: B.kt
+// RECOMPILE
+
+class B : A() {
+    override fun f(): Int = super.f() + 2
+}
+
+// FILE: box.kt
+
+fun box(): String {
+    val af = A().f()
+    if (af != 1) return "fail: result of 'A().f()' is '$af', but '1' was expected"
+
+    val bf = B().f()
+    if (bf != 3) return "fail: result of 'B().f()' is '$bf', but '3' was expected"
+
+    return "OK"
+}