diff --git a/opening-hours-syntax/src/tests/rubik.rs b/opening-hours-syntax/src/tests/rubik.rs
index 8a4a8c1c..517c2824 100644
--- a/opening-hours-syntax/src/tests/rubik.rs
+++ b/opening-hours-syntax/src/tests/rubik.rs
@@ -70,6 +70,7 @@ fn test_pop_disjoint() {
     // 5 ⋅ A ⋅ ⋅ B B B ⋅
     // 6 ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅
     let mut grid = grid_empty.clone();
+
     grid.set(
         &EmptyPavingSelector.dim([1..2, 4..7]).dim_front([3..6]),
         true,
@@ -83,3 +84,21 @@ fn test_pop_disjoint() {
     assert_eq!(grid, grid_empty);
     assert_eq!(grid.pop_selector(true), None);
 }
+
+#[test]
+fn test_debug() {
+    //   0 1 2 3 4 5 6 7
+    // 2 ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅
+    // 3 ⋅ A ⋅ ⋅ B B B ⋅
+    // 4 ⋅ A ⋅ ⋅ B B B ⋅
+    // 5 ⋅ A ⋅ ⋅ B B B ⋅
+    // 6 ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅
+    let mut grid = Paving2D::default();
+
+    grid.set(
+        &EmptyPavingSelector.dim([1..2, 4..7]).dim_front([3..6]),
+        true,
+    );
+
+    assert_eq!(&format!("{grid:?}"), "Dim { [3, 6[: Dim { [1, 2[: Cell { inner: true }, [2, 4[: Cell { inner: false }, [4, 7[: Cell { inner: true } } }")
+}
diff --git a/opening-hours/src/utils/range.rs b/opening-hours/src/utils/range.rs
index 3708fc1e..770c36d3 100644
--- a/opening-hours/src/utils/range.rs
+++ b/opening-hours/src/utils/range.rs
@@ -24,22 +24,6 @@ impl<D> DateTimeRange<D> {
     ) -> Self {
         Self { range, kind, comments }
     }
-
-    pub fn map_dates<D2>(self, mut map: impl FnMut(D) -> D2) -> DateTimeRange<D2> {
-        DateTimeRange {
-            range: map(self.range.start)..map(self.range.end),
-            kind: self.kind,
-            comments: self.comments,
-        }
-    }
-
-    pub fn comments(&self) -> &[Arc<str>] {
-        &self.comments
-    }
-
-    pub fn into_comments(self) -> UniqueSortedVec<Arc<str>> {
-        self.comments
-    }
 }
 
 // WrappingRange