winapi::d3d12::PFN_D3D12_SERIALIZE_ROOT_SIGNATURE

type PFN_D3D12_SERIALIZE_ROOT_SIGNATURE = extern "system" fn(pRootSignature: *const D3D12_ROOT_SIGNATURE_DESC, Version: D3D_ROOT_SIGNATURE_VERSION, ppBlob: *mut *mut ID3DBlob, ppErrorBlob: *mut *mut ID3DBlob) -> HRESULT;