Function rnapkin::draw::gather_bubbles

pub fn gather_bubbles<T>(
    tree: &Tree<DotBracket>,
    seq: &T,
    bblr: f64,
    starting_angle: f64
) -> BubbleVecwhere
    T: Index<usize, Output = Nucleotide>,

gathers x, y coordinates of the nucleotide bubbles there’s little point to setting bblr to something other than bblr=0.5 because points and bubble radius can be easily upscaled later