diff --git a/Cargo.toml b/Cargo.toml
index 58eec4b..89c7156 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,7 +10,7 @@ rust-version = "1.70"
 
 [dependencies]
 cfg-if = "1.0"
-paste = "1.0.14"
+paste = "1.0"
 serde = { version = "1.0", optional = true, features = ["derive"]}
 
 [dev-dependencies]
diff --git a/src/impls/columns.rs b/src/impls/columns.rs
index 618939d..e11c959 100644
--- a/src/impls/columns.rs
+++ b/src/impls/columns.rs
@@ -20,9 +20,33 @@ use crate::{CopyOnto, CopyRegion, Index, Region};
 ///
 /// Copy a table-like structure:
 /// ```
+/// # use flatcontainer::impls::deduplicate::ConsecutiveOffsetPairs;
+/// # use flatcontainer::{ColumnsRegion, CopyOnto, Region, StringRegion};
+/// let data = [
+///     vec![],
+///     vec!["1"],
+///     vec!["2", "3"],
+///     vec!["4", "5", "6"],
+///     vec!["7", "8"],
+///     vec!["9"],
+///     vec![],
+/// ];
+///
+/// let mut r = ColumnsRegion::<ConsecutiveOffsetPairs<StringRegion>, _>::default();
+///
+/// let mut indices = Vec::with_capacity(data.len());
+///
+/// for row in &data {
+///     let index = row.copy_onto(&mut r);
+///     indices.push(index);
+/// }
+///
+/// for (&index, row) in indices.iter().zip(&data) {
+///     assert!(row.iter().copied().eq(r.index(index).iter()));
+/// }
 /// ```
 #[derive(Debug)]
-struct ColumnsRegion<R, Idx>
+pub struct ColumnsRegion<R, Idx>
 where
     R: Region<Index = Idx>,
     Idx: Index,
diff --git a/src/lib.rs b/src/lib.rs
index 387cb0b..7aa5822 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -37,6 +37,7 @@ use serde::{Deserialize, Serialize};
 pub mod codec;
 pub mod impls;
 
+pub use impls::columns::ColumnsRegion;
 pub use impls::mirror::MirrorRegion;
 pub use impls::option::OptionRegion;
 pub use impls::result::ResultRegion;