syntax sugar for single gen*

What about the `gen*` functions where we don't pass anything or a reference to a single identifier?

Shall we make it syntax-wise coherent and have, for example:

`genTexture(): GlTexture`

`genTexture(texture: KMutableProperty0<GlTexture>)`

Or better, prefer the uniformity and have all in plural? That is `genTextures` in this example