I still handwavily use one concept of class diagrams, letting arrows point at something that it depends on, without caring about the style of arrow, for sure I

I still handwavily use one concept of class diagrams, letting arrows point at something that it depends on, without caring about the style of arrow, for sure I don't draw dashed arrows. It doesn't even have to be classes, could be a function calling another function, or a library depending another.