diff --git a/src/utils/dateutils/bdates.rs b/src/utils/dateutils/bdates.rs
index 0182ae7..bac5f5c 100644
--- a/src/utils/dateutils/bdates.rs
+++ b/src/utils/dateutils/bdates.rs
@@ -1,7 +1,9 @@
+//! This module provides functionality for generating and manipulating business dates.
+//! It includes the `BDatesList`, which emulates a `DateList` structure and its properties.
+//! It uses `DateList` and `DateListGenerator`, adjusting the output to work on business dates.
+
 use chrono::{Datelike, Duration, NaiveDate, Weekday};
-use std::collections::HashMap;
 use std::error::Error;
-use std::hash::Hash;
 use std::result::Result;
 
 use crate::utils::dateutils::dates::{find_next_date, AggregationType, DateFreq, DatesGenerator};
@@ -16,19 +18,6 @@ pub struct BDatesList {
     start_date_str: String,
     end_date_str: String,
     freq: DateFreq,
-    // TODO: cache the generated date list to reduce repeated computation.
-    // Currently, list(), count(), and groups() regenerate the list on every invocation.
-    // cached_list: Option<Vec<NaiveDate>>,
-}
-
-// Enumeration of period keys used for grouping dates.
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, PartialOrd, Ord)]
-enum GroupKey {
-    Daily(NaiveDate),    // Daily grouping: use the exact date
-    Weekly(i32, u32),    // Weekly grouping: use year and ISO week number
-    Monthly(i32, u32),   // Monthly grouping: use year and month (1-12)
-    Quarterly(i32, u32), // Quarterly grouping: use year and quarter (1-4)
-    Yearly(i32),         // Yearly grouping: use year
 }
 
 /// Represents a collection of business dates generated according to specific rules.
@@ -404,7 +393,6 @@ impl Iterator for BDatesGenerator {
 
             DateFreq::WeeklyMonday | DateFreq::WeeklyFriday => next_date,
             DateFreq::MonthEnd | DateFreq::QuarterEnd | DateFreq::YearEnd => {
-                // Adjust to the last business date of the month, quarter, or year.
                 let adjusted_date = iter_reverse_till_bdate(next_date);
                 if self.start_date > adjusted_date {
                     // Skip this iteration if the adjusted date is before the start date.
@@ -1192,4 +1180,4 @@ mod tests {
         );
         Ok(())
     }
-} // end mod tests
+}