Create from Usage: Support generation of abstract members for superclasses. Skip non-abstract superclasses when generating abstract member

#KT-14019 Fixed

idea/ide-common/src/org/jetbrains/kotlin/idea/util/TypeUtils.kt

@@ -19,6 +19,7 @@
 package org.jetbrains.kotlin.idea.util
 
 import org.jetbrains.kotlin.descriptors.ClassDescriptor
+import org.jetbrains.kotlin.descriptors.Modality
 import org.jetbrains.kotlin.descriptors.TypeParameterDescriptor
 import org.jetbrains.kotlin.idea.imports.canBeReferencedViaImport
 import org.jetbrains.kotlin.incremental.components.NoLookupLocation
@@ -30,7 +31,10 @@ import org.jetbrains.kotlin.resolve.descriptorUtil.builtIns
 import org.jetbrains.kotlin.resolve.scopes.LexicalScope
 import org.jetbrains.kotlin.resolve.scopes.utils.findClassifier
 import org.jetbrains.kotlin.types.*
-import org.jetbrains.kotlin.types.typeUtil.*
+import org.jetbrains.kotlin.types.typeUtil.builtIns
+import org.jetbrains.kotlin.types.typeUtil.immediateSupertypes
+import org.jetbrains.kotlin.types.typeUtil.substitute
+import org.jetbrains.kotlin.types.typeUtil.supertypes
 import org.jetbrains.kotlin.utils.SmartSet
 import org.jetbrains.kotlin.utils.addToStdlib.singletonList
 
@@ -141,4 +145,9 @@ fun KotlinType.getResolvableApproximations(scope: LexicalScope?, checkTypeParame
 
                 it.replace(newArguments)
             }
+}
+
+fun KotlinType.isAbstract(): Boolean {
+    val modality = (constructor.declarationDescriptor as? ClassDescriptor)?.modality
+    return modality == Modality.ABSTRACT || modality == Modality.SEALED
 }