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: weather.rs
    path of file: ./repos/ratatui/examples/demo2/tabs
    
    the code of the file until where you have to start completion: use itertools::Itertools;
use palette::Okhsv;
use ratatui::{
    prelude::*,
    widgets::{calendar::CalendarEventStore, *},
};
use time::OffsetDateTime;

use crate::{color_from_oklab, RgbSwatch, THEME};

#[derive(Debug, Clone, Copy, Default, PartialEq, Eq)]
pub struct WeatherTab {
    pub download_progress: usize,
}

impl WeatherTab {
    /// Simulate a download indicator by decrementing the row index.
    pub fn prev(&mut self) {
        self.download_progress = self.download_progress.saturating_sub(1);
    }

    /// Simulate a download indicator by incrementing the 
    
fn render_horizontal_barchart(area: Rect, buf: &mut Buffer) {
    let bg = Color::Rgb(32, 48, 96);
    let data = [
        Bar::default().text_value("Winter 37-51".into()).value(51),
        Bar::default().text_value("Spring 40-65".into()).value(65),
        Bar::default().text_value("Summer 54-77".into()).value(77),
        Bar::default()
            .text_value("Fall 41-71".into())
            .value(71)
            .value_style(Style::new().bold()), // current season
    ];
    let group = BarGroup::default().label("GPU".into()).bars(&data);
    BarChart::default()
        .block(Block::new().padding(Padding::new(0, 0, 2, 0)))
        .direction(Direction::Horizontal)
        .data(group)
        .bar_gap(1)
        .bar_style(Style::new().fg(bg))
        .value_style(Style::new().bg(bg).fg(Color::Gray))
        .render(area, buf);
}