MPP: Support multiple 'expectedBy' dependencies for single module

#KT-22865 Fixed

idea/src/org/jetbrains/kotlin/idea/facet/facetUtils.kt

@@ -123,11 +123,8 @@ val mavenLibraryIdToPlatform: Map<String, TargetPlatformKind<*>> by lazy {
             .toMap()
 }
 
-internal fun Module.findImplementingModules(modelsProvider: IdeModifiableModelsProvider): List<Module> {
-    return modelsProvider.modules.filter { module ->
-        module.findImplementedModuleName(modelsProvider) == name
-    }
-}
+internal fun Module.findImplementingModules(modelsProvider: IdeModifiableModelsProvider) =
+    modelsProvider.modules.filter { name in it.findImplementedModuleNames(modelsProvider) }
 
 val Module.implementingModules: List<Module>
     get() = cached(CachedValueProvider {
@@ -167,12 +164,11 @@ val ModuleDescriptor.implementingDescriptors: List<ModuleDescriptor>
         })
     }
 
-val ModuleDescriptor.implementedDescriptor: ModuleDescriptor?
+val ModuleDescriptor.implementedDescriptors: List<ModuleDescriptor>
     get() {
-        val moduleSourceInfo = getCapability(ModuleInfo.Capability) as? ModuleSourceInfo ?: return null
+        val moduleSourceInfo = getCapability(ModuleInfo.Capability) as? ModuleSourceInfo ?: return emptyList()
 
-        val implementedModuleInfo = moduleSourceInfo.expectedBy
-        return implementedModuleInfo?.let {
+        return moduleSourceInfo.expectedBy.mapNotNull {
             KotlinCacheService.getInstance(moduleSourceInfo.module.project)
                 .getResolutionFacadeByModuleInfo(it, it.platform)?.moduleDescriptor
         }

idea/src/org/jetbrains/kotlin/idea/highlighter/markers/HasExpectedMarker.kt

@@ -20,7 +20,7 @@ import org.jetbrains.kotlin.descriptors.*
 import org.jetbrains.kotlin.idea.caches.resolve.findModuleDescriptor
 import org.jetbrains.kotlin.idea.caches.resolve.resolveToDescriptorIfAny
 import org.jetbrains.kotlin.idea.core.toDescriptor
-import org.jetbrains.kotlin.idea.facet.implementedDescriptor
+import org.jetbrains.kotlin.idea.facet.implementedDescriptors
 import org.jetbrains.kotlin.idea.search.usagesSearch.descriptor
 import org.jetbrains.kotlin.psi.KtClassOrObject
 import org.jetbrains.kotlin.psi.KtDeclaration
@@ -44,8 +44,8 @@ fun getExpectedDeclarationTooltip(declaration: KtDeclaration?): String? {
     val descriptor = declaration?.toDescriptor() as? MemberDescriptor ?: return null
     val platformModuleDescriptor = declaration.containingKtFile.findModuleDescriptor()
 
-    val commonModuleDescriptor = platformModuleDescriptor.implementedDescriptor ?: return null
-    if (!commonModuleDescriptor.hasDeclarationOf(descriptor)) return null
+    val commonModuleDescriptors = platformModuleDescriptor.implementedDescriptors ?: return null
+    if (!commonModuleDescriptors.any { it.hasDeclarationOf(descriptor) }) return null
 
     return "Has declaration in common module"
 }
@@ -54,7 +54,10 @@ fun navigateToExpectedDeclaration(declaration: KtDeclaration?) {
     declaration?.expectedDeclarationIfAny()?.navigate(false)
 }
 
-internal fun MemberDescriptor.expectedDescriptor() = module.implementedDescriptor?.declarationOf(this)
+internal fun MemberDescriptor.expectedDescriptors() = module.implementedDescriptors.mapNotNull { it.declarationOf(this) }
+
+// TODO: Sort out the cases with multiple expected descriptors
+internal fun MemberDescriptor.expectedDescriptor() = expectedDescriptors().firstOrNull()
 
 internal fun KtDeclaration.expectedDeclarationIfAny(): KtDeclaration? {
     val expectedDescriptor = (toDescriptor() as? MemberDescriptor)?.expectedDescriptor() ?: return null

idea/src/org/jetbrains/kotlin/idea/highlighter/markers/KotlinLineMarkerProvider.kt

@@ -39,7 +39,7 @@ import org.jetbrains.kotlin.idea.caches.lightClasses.KtFakeLightMethod
 import org.jetbrains.kotlin.idea.core.isInheritable
 import org.jetbrains.kotlin.idea.core.isOverridable
 import org.jetbrains.kotlin.idea.core.toDescriptor
-import org.jetbrains.kotlin.idea.facet.implementedDescriptor
+import org.jetbrains.kotlin.idea.facet.implementedDescriptors
 import org.jetbrains.kotlin.idea.facet.implementingDescriptors
 import org.jetbrains.kotlin.idea.search.declarationsSearch.toPossiblyFakeLightMethods
 import org.jetbrains.kotlin.idea.util.ProjectRootsUtil
@@ -379,8 +379,7 @@ private fun collectExpectedMarkers(declaration: KtNamedDeclaration,
 
     val descriptor = declaration.toDescriptor() as? MemberDescriptor ?: return
     val platformModuleDescriptor = declaration.containingKtFile.findModuleDescriptor()
-    val commonModuleDescriptor = platformModuleDescriptor.implementedDescriptor ?: return
-    if (!commonModuleDescriptor.hasDeclarationOf(descriptor)) return
+    if (!platformModuleDescriptor.implementedDescriptors.any { it.hasDeclarationOf(descriptor) }) return
 
     val anchor = declaration.expectOrActualAnchor