Function create_estimate_chart 

pub fn create_estimate_chart<'a, T>(
    grouped_time_log: BTreeMap<impl Into<Option<&'a T>> + Clone, Vec<&'a TimeLog>>,
    title: &str,
    render_options: &mut RenderOptions<'_>,
) -> Result<(), ChartSettingError>
where
    T: Display + 'a,

Creates a chart with estimates and actual time from grouped time logs (i.e., Estimates vs. actual time on all labels)

Errors

• Returns ChartSettingError::FileNotFound if the file in RenderOptions does not exist.
• Returns ChartSettingError::CharmingError if the graph could not be created.