pub type PFN_vkGetSamplerOpaqueCaptureDescriptorDataEXT = unsafe extern "system" fn(_device: Device, _info: *const SamplerCaptureDescriptorDataInfoEXT, _data: *mut c_void) -> Result;
https://www.khronos.org/registry/vulkan/specs/latest/man/html/vkGetSamplerOpaqueCaptureDescriptorDataEXT.html