Add call checker to report error more granulary if possible

This, however, works only for calls of 'synchronized' only. Thus, it
does not support inline functions of any kind.

core/descriptors/src/org/jetbrains/kotlin/descriptors/descriptorUtil.kt

@@ -44,4 +44,12 @@ fun ModuleDescriptor.getContinuationOfTypeOrAny(kotlinType: KotlinType, isReleas
             it,
             arguments = listOf(kotlinType.asTypeProjection())
         )
-    } ?: module.builtIns.nullableAnyType
+    } ?: module.builtIns.nullableAnyType
+
+fun DeclarationDescriptor.isTopLevelInPackage(name: String, packageName: String): Boolean {
+    if (name != this.name.asString()) return false
+
+    val containingDeclaration = containingDeclaration as? PackageFragmentDescriptor ?: return false
+    val packageFqName = containingDeclaration.fqName.asString()
+    return packageName == packageFqName
+}