From an FP point of view the function impl is enti...

# codingconventions

[raulraja]

From an FP point of view the function impl is entirely side effecting and using it as an expression will be confusing to most people coming from an FP background. Normally expressions are expected to be pure or at least return a value. In this case my preference would be 1 type annotated with Unit to show that this function performs effects and does not return a value.