You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: box_elem.rs
    path of file: ./repos/egui/crates/egui_plot/src/items
    
    the code of the file until where you have to start completion: use egui::emath::NumExt as _;
use egui::epaint::{Color32, RectShape, Rounding, Shape, Stroke};

use crate::{BoxPlot, Cursor
    
    fn values_with_ruler(&self) -> Vec<PlotPoint> {
        let median = self.point_at(self.argument, self.spread.median);
        let q1 = self.point_at(self.argument, self.spread.quartile1);
        let q3 = self.point_at(self.argument, self.spread.quartile3);
        let upper = self.point_at(self.argument, self.spread.upper_whisker);
        let lower = self.point_at(self.argument, self.spread.lower_whisker);

        vec![median, q1, q3, upper, lower]
    }