Type Definition PFN_vkFreeFunction
ash::vk
type PFN_vkFreeFunction = Option<unsafe extern "system" fn(p_user_data: *mut c_void, p_memory: *mut c_void) -> c_void>;
https://www.khronos.org/registry/vulkan/specs/1.2-extensions/man/html/PFN_vkFreeFunction.html