Unify received properties for strokes

Hey guys,
i am new here and want to say first: I love the way we can implement plugins to figma, this is awesome, great work!

I noticed the following:
if I want to check a node to see whether it contains a stroke, I have to query different properties, depending on whether I have a node of type GROUP or FRAME.

For example, if i want to check the node type GROUP for strokes, i am fine with if(node.strokes), because it is undefined if not set. If i check the type FRAME, i have to use if(node.strokes.length), because it is empty but not undefined.

Maybe I’m missing a property that is unique, but it seems to me that this is some kind of a bug?