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: mod.rs
    path of file: ./repos/RustQuant/src/time/day_counting
    
    the code of the file until where you have to start completion: // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// RustQuant: A Rust library for quantitative finance tools.
// Copyright (C) 2022-2024 https://github.com/avhz
// Dual licensed under Apache 2.0 and MIT.
// See:
//      - LICENSE-APACHE.md
//      - LICENSE-MIT.md
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

/// Actual/Actual day count factor calculation.
pub mod actual_actual;

/// Actual/xxx day count factor calculation.
pub mod actual_constant;

/// No-Leap day count factor calculation.
pub mod no_leap;

/// One/One day count factor calculation.
pub mod one_one;

/// Simple day count factor calculation.
pub mod simple;

/// Thir
    
    pub fn day_count_factor(&self, start_date: Date, end_date: Date) -> f64 {
        match self {
            Self::One_One               => Self::day_count_factor_one_one(start_date, end_date),
            Self::Actual_360            => Self::day_count_factor_actual_360(start_date, end_date),
            Self::Actual_364            => Self::day_count_factor_actual_364(start_date, end_date),
            Self::Actual_366            => Self::day_count_factor_actual_366(start_date, end_date),
            Self::Actual_365_25         => Self::day_count_factor_actual_365_25(start_date, end_date),
            Self::Actual_365_Actual     => Self::day_count_factor_actual_365_actual(start_date, end_date),
            Self::Actual_365_Fixed      => Self::day_count_factor_actual_365_fixed(start_date, end_date),
            Self::Actual_365_Leap       => Self::day_count_factor_actual_365_leap(start_date, end_date),
            Self::Actual_Actual_AFB     => Self::day_count_factor_actual_actual_afb(start_date, end_date),
            Self::Actual_Actual_ICMA    => Self::day_count_factor_actual_actual_icma(start_date, end_date),
            Self::Actual_Actual_ISDA    => Self::day_count_factor_actual_actual_isda(start_date, end_date),
            Self::No_Leap_360           => Self::day_count_factor_nl_360(start_date, end_date),
            Self::No_Leap_365           => Self::day_count_factor_nl_365(start_date, end_date),
            Self::Thirty_360_ISDA       => Self::day_count_factor_thirty_360_isda(start_date, end_date),
            Self::Thirty_E_360          => Self::day_count_factor_thirty_e_360(start_date, end_date),
            Self::Thirty_E_360_ISDA     => Self::day_count_factor_thirty_e_360_isda(start_date, end_date),
            Self::Thirty_E_365          => Self::day_count_factor_thirty_e_365(start_date, end_date),
            Self::Thirty_E_Plus_360     => Self::day_count_factor_thirty_e_plus_360(start_date, end_date),
            Self::Thirty_U_360          => Self::day_count_factor_thirty_u_360(start_date, end_date),
        }
    }