pub type PFN_vkCmdBindIndexBuffer2 = unsafe extern "system" fn(_command_buffer: CommandBuffer, _buffer: Buffer, _offset: DeviceSize, _size: DeviceSize, _index_type: IndexType);pub type PFN_vkCmdBindIndexBuffer2 = unsafe extern "system" fn(_command_buffer: CommandBuffer, _buffer: Buffer, _offset: DeviceSize, _size: DeviceSize, _index_type: IndexType);