What is the name of the C=N+=C functional group?

[magic9mushroo]

TL;DR

I don't know what these compounds are called.

I know R₄N⁺ is a quaternary ammonium, R₂C=N⁺R₂ is an iminium, and R-C≡N⁺-R is a nitrilium, but what is an R₂C=N⁺=CR₂ cation called?

 

[mjc123]

I think it's called a 2-azaallene cation