[LL API] Provide proper way for automatic registration of compiler plugins

analysis/project-structure/src/org/jetbrains/kotlin/analysis/project/structure/KtCompilerPluginsProvider.kt

@@ -0,0 +1,18 @@
+/*
+ * Copyright 2010-2022 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.analysis.project.structure
+
+import org.jetbrains.kotlin.extensions.ProjectExtensionDescriptor
+
+/**
+ * A service which can return extensions which are registered for some module
+ */
+public abstract class KtCompilerPluginsProvider {
+    /**
+     * Returns a list of extensions of a base [extensionType] which are registered for [module]
+     */
+    public abstract fun <T : Any> getRegisteredExtensions(module: KtSourceModule, extensionType: ProjectExtensionDescriptor<T>): List<T>
+}