pub struct Container {
    max_samples: u32,
    data: Vec<Vec<f32>>,
}

impl Container {
    pub fn new(max_samples: u32) -> Container {
        Container {
            max_samples: max_samples,
            data: vec![],
        }
    }

    pub fn push(&mut self, data: Vec<f32>) {
        if self.data.len() as u32 > self.max_samples {
            self.data.pop();
        }
        self.data.push(data)
    }

    pub fn iter(&self) -> std::slice::Iter<'_, Vec<f32>> {
        self.data.iter()
    }
}