pub type PFN_vkCmdFillBuffer = unsafe extern "system" fn(command_buffer: CommandBuffer, dst_buffer: Buffer, dst_offset: DeviceSize, size: DeviceSize, data: u32);
pub type PFN_vkCmdFillBuffer = unsafe extern "system" fn(command_buffer: CommandBuffer, dst_buffer: Buffer, dst_offset: DeviceSize, size: DeviceSize, data: u32);