functions.filterNotNull()
                .filterNot { it.modality == Modality.ABSTRACT }
                .forEach { function ->
                function.allOverriddenDescriptors
                        .map { OverriddenFunctionDescriptor(function, it) }
                        .filter { !it.bridgeDirections.allNotNeeded() }
                        .filter { it.canBeCalledVirtually }
                        .filter { !it.inheritsBridge }
                        .distinctBy { it.bridgeDirections }
                        .forEach {
                            buildBridge(it, irClass)
                        }
        }