Function get_device_queue 

pub unsafe fn get_device_queue(
    device: &Device,
    queue_family_index: u32,
    queue_index: u32,
) -> Result<Queue, CallError>

Retrieve a queue handle from this device.

Safety

queue_family_index and queue_index must be within the bounds of the queue families requested at device creation.

Khronos reference: vkGetDeviceQueue