pub type PFN_vkGetRayTracingShaderGroupHandlesKHR = unsafe extern "system" fn(_device: Device, _pipeline: Pipeline, _first_group: u32, _group_count: u32, _data_size: usize, _data: *mut c_void) -> Result;
https://www.khronos.org/registry/vulkan/specs/latest/man/html/vkGetRayTracingShaderGroupHandlesKHR.html