Make Kotlin OOCBM updater for modules internal again

Replace direct API access with dedicated service.

idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/project/ResolutionAnchorAwareLibraryModificationTracker.kt

@@ -7,14 +7,15 @@ package org.jetbrains.kotlin.idea.caches.project
 
 import com.intellij.openapi.util.ModificationTracker
 import org.jetbrains.kotlin.idea.caches.resolve.ResolutionAnchorCacheService
-import org.jetbrains.kotlin.idea.caches.trackers.KotlinCodeBlockModificationListener
+import org.jetbrains.kotlin.idea.caches.trackers.ResolutionAnchorModificationCountService
 
 class ResolutionAnchorAwareLibraryModificationTracker(
     private val libraryInfo: LibraryInfo,
 ) : ModificationTracker {
     override fun getModificationCount(): Long {
-        val anchorDependencies = ResolutionAnchorCacheService.getInstance(libraryInfo.project).getDependencyResolutionAnchors(libraryInfo)
-        val updaterForModules = KotlinCodeBlockModificationListener.getInstance(libraryInfo.project).perModuleOutOfCodeBlockTrackerUpdater
-        return anchorDependencies.maxOfOrNull { updaterForModules.getModificationCount(it.module) } ?: 0
+        val anchorDependencyModules = ResolutionAnchorCacheService.getInstance(libraryInfo.project)
+            .getDependencyResolutionAnchors(libraryInfo)
+            .map { it.module }
+        return ResolutionAnchorModificationCountService.getLatestModificationCount(anchorDependencyModules)
     }
 }

idea/idea-frontend-independent/src/org/jetbrains/kotlin/idea/caches/trackers/KotlinCodeBlockModificationListenerCompat.kt

@@ -50,8 +50,7 @@ abstract class KotlinCodeBlockModificationListenerCompat(protected val project:
 
     lateinit var kotlinOutOfCodeBlockTracker: ModificationTracker
 
-    // TODO: close back exposed API
-    val perModuleOutOfCodeBlockTrackerUpdater = KotlinModuleOutOfCodeBlockModificationTracker.Updater(project)
+    internal val perModuleOutOfCodeBlockTrackerUpdater = KotlinModuleOutOfCodeBlockModificationTracker.Updater(project)
 
     protected fun init(
         treeAspect: TreeAspect,

idea/idea-frontend-independent/src/org/jetbrains/kotlin/idea/caches/trackers/KotlinModuleOutOfCodeBlockModificationTracker.kt

@@ -68,8 +68,7 @@ class KotlinModuleOutOfCodeBlockModificationTracker private constructor(private
         }
     }
 
-    // TODO: close back exposed API
-    class Updater(project: Project) {
+    internal class Updater(project: Project) {
         private val kotlinOfOfCodeBlockTracker by lazy {
             KotlinCodeBlockModificationListener.getInstance(project).kotlinOutOfCodeBlockTracker
         }
@@ -84,8 +83,7 @@ class KotlinModuleOutOfCodeBlockModificationTracker private constructor(private
         // perModuleModCount map
         private var perModuleChangesHighWatermark: Long? = null
 
-        // TODO: close back exposed API
-        fun getModificationCount(module: Module): Long {
+        internal fun getModificationCount(module: Module): Long {
             return perModuleModCount[module] ?: perModuleChangesHighWatermark ?: kotlinOfOfCodeBlockTracker.modificationCount
         }
 

idea/idea-frontend-independent/src/org/jetbrains/kotlin/idea/caches/trackers/ResolutionAnchorModificationCountService.kt

@@ -0,0 +1,21 @@
+/*
+ * Copyright 2010-2020 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.
+ */
+
+package org.jetbrains.kotlin.idea.caches.trackers
+
+import com.intellij.openapi.module.Module
+import com.intellij.openapi.util.ModificationTracker
+
+object ResolutionAnchorModificationCountService {
+    fun getLatestModificationCount(anchorModules: Collection<Module>): Long {
+        if (anchorModules.isEmpty())
+            return ModificationTracker.NEVER_CHANGED.modificationCount
+
+        val modificationCountUpdater =
+            KotlinCodeBlockModificationListener.getInstance(anchorModules.first().project).perModuleOutOfCodeBlockTrackerUpdater
+        return anchorModules.maxOfOrNull { modificationCountUpdater.getModificationCount(it) }
+            ?: ModificationTracker.NEVER_CHANGED.modificationCount
+    }
+}