pub type PFN_vkCreateCommandPool = unsafe extern "system" fn(device: Device, p_create_info: *const CommandPoolCreateInfo, p_allocator: *const AllocationCallbacks, p_command_pool: *mut CommandPool) -> Result;
pub type PFN_vkCreateCommandPool = unsafe extern "system" fn(device: Device, p_create_info: *const CommandPoolCreateInfo, p_allocator: *const AllocationCallbacks, p_command_pool: *mut CommandPool) -> Result;