// values doesn't matter.
                    snapshot[it] != ConfigurationCacheFingerprint.SystemPropertiesPrefixedBy.IGNORED
                }
                val snapshotWithoutIgnored = snapshot.filterValues {
                    // remove placeholders of modified properties to only compare relevant values.
                    it != ConfigurationCacheFingerprint.SystemPropertiesPrefixedBy.IGNORED
                }

                        isLeaf[superClass] = false
                        queue.addLast(superClass)
                    }
                }
            }
        }

        return isLeaf.filterValues { it }.keys
    }

    private fun getBoundClass(type: KotlinType): ClassDescriptor? {
        return when (val declaration = type.constructor.declarationDescriptor) {
            is ClassDescriptor -> declaration