Introduce FirResolvedTypeRef.delegatedTypeRef to see children types in IDE

This is needed to have access to resolved children types (e.g. type arguments) from IDE

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/types/FirErrorTypeRef.kt

@@ -20,6 +20,7 @@ abstract class FirErrorTypeRef : FirResolvedTypeRef(), FirDiagnosticHolder {
     abstract override val source: FirSourceElement?
     abstract override val annotations: List<FirAnnotationCall>
     abstract override val type: ConeKotlinType
+    abstract override val delegatedTypeRef: FirTypeRef?
     abstract override val diagnostic: FirDiagnostic
 
     override fun <R, D> accept(visitor: FirVisitor<R, D>, data: D): R = visitor.visitErrorTypeRef(this, data)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/types/FirResolvedFunctionTypeRef.kt

@@ -19,6 +19,7 @@ abstract class FirResolvedFunctionTypeRef : FirResolvedTypeRef(), FirFunctionTyp
     abstract override val source: FirSourceElement?
     abstract override val annotations: List<FirAnnotationCall>
     abstract override val type: ConeKotlinType
+    abstract override val delegatedTypeRef: FirTypeRef?
     abstract override val isMarkedNullable: Boolean
     abstract override val receiverTypeRef: FirTypeRef?
     abstract override val valueParameters: List<FirValueParameter>

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/types/FirResolvedTypeRef.kt

@@ -19,6 +19,7 @@ abstract class FirResolvedTypeRef : FirPureAbstractElement(), FirTypeRef {
     abstract override val source: FirSourceElement?
     abstract override val annotations: List<FirAnnotationCall>
     abstract val type: ConeKotlinType
+    abstract val delegatedTypeRef: FirTypeRef?
 
     override fun <R, D> accept(visitor: FirVisitor<R, D>, data: D): R = visitor.visitResolvedTypeRef(this, data)
 }

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/types/impl/FirErrorTypeRefImpl.kt

@@ -12,6 +12,7 @@ import org.jetbrains.kotlin.fir.impl.FirAbstractAnnotatedElement
 import org.jetbrains.kotlin.fir.types.ConeClassErrorType
 import org.jetbrains.kotlin.fir.types.ConeKotlinType
 import org.jetbrains.kotlin.fir.types.FirErrorTypeRef
+import org.jetbrains.kotlin.fir.types.FirTypeRef
 import org.jetbrains.kotlin.fir.visitors.*
 
 /*
@@ -25,6 +26,7 @@ class FirErrorTypeRefImpl(
 ) : FirErrorTypeRef(), FirAbstractAnnotatedElement {
     override val annotations: MutableList<FirAnnotationCall> = mutableListOf()
     override val type: ConeKotlinType = ConeClassErrorType(diagnostic.reason)
+    override val delegatedTypeRef: FirTypeRef? get() = null
 
     override fun <R, D> acceptChildren(visitor: FirVisitor<R, D>, data: D) {
         annotations.forEach { it.accept(visitor, data) }

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/types/impl/FirResolvedFunctionTypeRefImpl.kt

@@ -27,6 +27,7 @@ class FirResolvedFunctionTypeRefImpl(
     override var returnTypeRef: FirTypeRef
 ) : FirResolvedFunctionTypeRef(), FirAbstractAnnotatedElement {
     override val annotations: MutableList<FirAnnotationCall> = mutableListOf()
+    override val delegatedTypeRef: FirTypeRef? get() = null
     override val valueParameters: MutableList<FirValueParameter> = mutableListOf()
 
     override fun <R, D> acceptChildren(visitor: FirVisitor<R, D>, data: D) {

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/types/impl/FirResolvedTypeRefImpl.kt

@@ -10,6 +10,7 @@ import org.jetbrains.kotlin.fir.expressions.FirAnnotationCall
 import org.jetbrains.kotlin.fir.impl.FirAbstractAnnotatedElement
 import org.jetbrains.kotlin.fir.types.ConeKotlinType
 import org.jetbrains.kotlin.fir.types.FirResolvedTypeRef
+import org.jetbrains.kotlin.fir.types.FirTypeRef
 import org.jetbrains.kotlin.fir.visitors.*
 
 /*
@@ -22,13 +23,16 @@ class FirResolvedTypeRefImpl(
     override val type: ConeKotlinType
 ) : FirResolvedTypeRef(), FirAbstractAnnotatedElement {
     override val annotations: MutableList<FirAnnotationCall> = mutableListOf()
+    override var delegatedTypeRef: FirTypeRef? = null
 
     override fun <R, D> acceptChildren(visitor: FirVisitor<R, D>, data: D) {
         annotations.forEach { it.accept(visitor, data) }
+        delegatedTypeRef?.accept(visitor, data)
     }
 
     override fun <D> transformChildren(transformer: FirTransformer<D>, data: D): FirResolvedTypeRefImpl {
         annotations.transformInplace(transformer, data)
+        delegatedTypeRef = delegatedTypeRef?.transformSingle(transformer, data)
         return this
     }
 }