Update docs for unique

Signed-off-by: Hans Kokx <hans.kokx@hackberry.se>

lib/src/extensions/list.dart

@@ -3,21 +3,6 @@
 /// This extension provides a `unique` method that removes duplicate entries
 /// from the list, optionally using a custom identifier function.
 ///
-/// Example usage:
-/// ```dart
-/// final list = [1, 2, 2, 3, 4, 4];
-/// final uniqueList = list.unique();
-/// print(uniqueList); // Output: [1, 2, 3, 4]
-///
-/// final people = [
-///   Person(id: 1, name: 'Alice'),
-///   Person(id: 2, name: 'Bob'),
-///   Person(id: 1, name: 'Alice Duplicate'),
-/// ];
-/// final uniquePeople = people.unique((person) => person.id);
-/// print(uniquePeople.map((p) => p.name)); // Output: ['Alice', 'Bob']
-/// ```
-///
 /// The method also supports in-place filtering for efficient memory usage.
 extension Unique<E, Id> on List<E> {
   /// Returns a new list with unique elements, filtered by the provided [id] function.
@@ -36,6 +21,22 @@ extension Unique<E, Id> on List<E> {
   /// Returns:
   /// A `List<E>` containing unique elements based on the specified [id] or the elements
   /// themselves if no [id] function is provided.
+  ///
+  /// Example usage:
+  /// ```dart
+  /// final list = [1, 2, 2, 3, 4, 4];
+  /// final uniqueList = list.unique();
+  /// print(uniqueList); // Output: [1, 2, 3, 4]
+  ///
+  /// final people = [
+  ///   Person(id: 1, name: 'Alice'),
+  ///   Person(id: 2, name: 'Bob'),
+  ///   Person(id: 1, name: 'Alice Duplicate'),
+  /// ];
+  /// final uniquePeople = people.unique((person) => person.id);
+  /// print(uniquePeople.map((p) => p.name)); // Output: ['Alice', 'Bob']
+  /// ```
+  ///
   List<E> unique([Id Function(E element)? id, bool inplace = true]) {
     final Set ids = {};
     final List<E> list = inplace ? this : List<E>.from(this);