[Test] Implement handler which dumps overrides tree of specified classes

compiler/fir/tree/src/org/jetbrains/kotlin/fir/FirRenderer.kt

@@ -54,6 +54,8 @@ class FirRenderer(builder: StringBuilder, private val mode: RenderMode = RenderM
         val renderCallableFqNames: Boolean,
         val renderDeclarationResolvePhase: Boolean,
         val renderAnnotation: Boolean,
+        val renderBodies: Boolean = true,
+        val renderPropertyAccessors: Boolean = true,
     ) {
         object Normal : RenderMode(
             renderLambdaBodies = true,
@@ -86,6 +88,16 @@ class FirRenderer(builder: StringBuilder, private val mode: RenderMode = RenderM
             renderDeclarationResolvePhase = true,
             renderAnnotation = true,
         )
+
+        object NoBodies : RenderMode(
+            renderLambdaBodies = false,
+            renderCallArguments = false,
+            renderCallableFqNames = false,
+            renderDeclarationResolvePhase = false,
+            renderAnnotation = false,
+            renderBodies = false,
+            renderPropertyAccessors = false,
+        )
     }
 
     private val printer = Printer(builder)
@@ -442,6 +454,7 @@ class FirRenderer(builder: StringBuilder, private val mode: RenderMode = RenderM
     override fun visitProperty(property: FirProperty) {
         visitVariable(property)
         if (property.isLocal) return
+        if (!mode.renderPropertyAccessors) return
         println()
         pushIndent()
         property.getter?.accept(this)
@@ -543,14 +556,17 @@ class FirRenderer(builder: StringBuilder, private val mode: RenderMode = RenderM
         anonymousInitializer.body?.renderBody()
     }
 
-    private fun FirBlock.renderBody(additionalStatements: List<FirStatement> = emptyList()) = when (this) {
-        is FirLazyBlock -> {
-            println(" { LAZY_BLOCK }")
-        }
-        else -> renderInBraces {
-            for (statement in additionalStatements + statements) {
-                statement.accept(this@FirRenderer)
-                println()
+    private fun FirBlock.renderBody(additionalStatements: List<FirStatement> = emptyList()) {
+        if (!mode.renderBodies) return
+        when (this) {
+            is FirLazyBlock -> {
+                println(" { LAZY_BLOCK }")
+            }
+            else -> renderInBraces {
+                for (statement in additionalStatements + statements) {
+                    statement.accept(this@FirRenderer)
+                    println()
+                }
             }
         }
     }

compiler/fir/tree/src/org/jetbrains/kotlin/fir/declarations/FirDeclarationOrigin.kt

@@ -5,7 +5,7 @@
 
 package org.jetbrains.kotlin.fir.declarations
 
-sealed class FirDeclarationOrigin(val fromSupertypes: Boolean = false) {
+sealed class FirDeclarationOrigin(private val displayName: String? = null, val fromSupertypes: Boolean = false) {
     object Source : FirDeclarationOrigin()
     object Library : FirDeclarationOrigin()
     object BuiltIns : FirDeclarationOrigin()
@@ -18,7 +18,11 @@ sealed class FirDeclarationOrigin(val fromSupertypes: Boolean = false) {
     object IntersectionOverride : FirDeclarationOrigin(fromSupertypes = true)
     object Delegated : FirDeclarationOrigin()
 
-    class Plugin(val key: FirPluginKey) : FirDeclarationOrigin()
+    class Plugin(val key: FirPluginKey) : FirDeclarationOrigin(displayName = "Plugin[$key]")
+
+    override fun toString(): String {
+        return displayName ?: this::class.simpleName!!
+    }
 }
 
 abstract class FirPluginKey