pub type PFN_vkSetHdrMetadataEXT = unsafe extern "system" fn(_device: Device, _swapchain_count: u32, _swapchains: *const SwapchainKHR, _metadata: *const HdrMetadataEXT);pub type PFN_vkSetHdrMetadataEXT = unsafe extern "system" fn(_device: Device, _swapchain_count: u32, _swapchains: *const SwapchainKHR, _metadata: *const HdrMetadataEXT);