Does dihydroimidazole show geometrical isomerism?

![dihydroimidazole](https://i.stack.imgur.com/9RpMhm.jpg)


Does dihydroimidazole (above) exhibit geometrical isomerism? Does the fact that the lone pair is involved in conjugation with a double bond affect anything?


As far as I know, it does not exhibit geometrical isomerism. However, one of my colleagues pointed out that the two nitrogens' lone pairs and hydrogens can adopt *cis* and *trans* configuration with respect to each other. 


Please provide a detailed explanation. If possible, please also cite your sources.


