Make SortedList a public API

It is exposed so it should be public. (Constructor is private anyways)

lib/src/iterable.dart

@@ -277,8 +277,8 @@ extension IterableSortedBy<E> on Iterable<E> {
   ///
   /// **Note:** The actual sorting is performed when an element is accessed for
   /// the first time.
-  _SortedList<E> sortedBy(Comparable Function(E element) selector) {
-    return _SortedList<E>._withSelector(this, selector, 1, null);
+  SortedList<E> sortedBy(Comparable Function(E element) selector) {
+    return SortedList<E>._withSelector(this, selector, 1, null);
   }
 }
 
@@ -292,8 +292,8 @@ extension IterableSortedByDescending<E> on Iterable<E> {
   ///
   /// **Note:** The actual sorting is performed when an element is accessed for
   /// the first time.
-  _SortedList<E> sortedByDescending(Comparable Function(E element) selector) {
-    return _SortedList<E>._withSelector(this, selector, -1, null);
+  SortedList<E> sortedByDescending(Comparable Function(E element) selector) {
+    return SortedList<E>._withSelector(this, selector, -1, null);
   }
 }
 
@@ -306,8 +306,8 @@ extension IterableSortedWith<E> on Iterable<E> {
   ///
   /// **Note:** The actual sorting is performed when an element is accessed for
   /// the first time.
-  _SortedList<E> sortedWith(Comparator<E> comparator) {
-    return _SortedList<E>._(this, comparator);
+  SortedList<E> sortedWith(Comparator<E> comparator) {
+    return SortedList<E>._(this, comparator);
   }
 }
 

lib/src/sorted_list.dart

@@ -12,17 +12,17 @@ Comparator<E> _getComparator<E>(
   return parent?.compose(newComparator) ?? newComparator;
 }
 
-class _SortedList<E> extends _DelegatingList<E> {
+class SortedList<E> extends _DelegatingList<E> {
   final Iterable<E> _source;
   final Comparator<E> _comparator;
   List<E>? _sortedResults;
 
-  _SortedList._(
+  SortedList._(
     this._source,
     this._comparator,
   );
 
-  _SortedList._withSelector(
+  SortedList._withSelector(
     this._source,
     Comparable Function(E element) selector,
     int order,
@@ -44,8 +44,8 @@ class _SortedList<E> extends _DelegatingList<E> {
   ///
   /// **Note:** The actual sorting is performed when an element is accessed for
   /// the first time.
-  _SortedList<E> thenBy(Comparable Function(E element) selector) {
-    return _SortedList<E>._withSelector(this, selector, 1, _comparator);
+  SortedList<E> thenBy(Comparable Function(E element) selector) {
+    return SortedList<E>._withSelector(this, selector, 1, _comparator);
   }
 
   /// Returns a new list with all elements sorted according to previously
@@ -54,17 +54,17 @@ class _SortedList<E> extends _DelegatingList<E> {
   ///
   /// **Note:** The actual sorting is performed when an element is accessed for
   /// the first time.
-  _SortedList<E> thenByDescending(Comparable Function(E element) selector) {
-    return _SortedList<E>._withSelector(this, selector, -1, _comparator);
+  SortedList<E> thenByDescending(Comparable Function(E element) selector) {
+    return SortedList<E>._withSelector(this, selector, -1, _comparator);
   }
 
   /// Returns a new list with all elements sorted according to previously
   /// defined order and specified [comparator].
   ///
   /// **Note:** The actual sorting is performed when an element is accessed for
   /// the first time.
-  _SortedList<E> thenWith(Comparator<E> comparator) {
-    return _SortedList<E>._(this, _comparator.compose(comparator));
+  SortedList<E> thenWith(Comparator<E> comparator) {
+    return SortedList<E>._(this, _comparator.compose(comparator));
   }
 
   @override