Moved implementations to extensions

src/cpl_query/extension/ordered_iterable.py

@@ -0,0 +1,20 @@
+from collections import Callable
+
+from .iterable import Iterable
+from .._query.order_by import then_by_query, then_by_descending_query
+from cpl_query.extension.ordered_iterable_abc import OrderedIterableABC
+
+
+class OrderedIterable(Iterable, OrderedIterableABC):
+
+    def __init__(self):
+        Iterable.__init__(self)
+        OrderedIterableABC.__init__(self)
+
+    def then_by(self, _func: Callable) -> OrderedIterableABC:
+        self._funcs.append(_func)
+        return then_by_query(self, lambda *args: [f(*args) for f in self._funcs])
+
+    def then_by_descending(self, _func: Callable) -> OrderedIterableABC:
+        self._funcs.append(_func)
+        return then_by_descending_query(self, lambda *args: [f(*args) for f in self._funcs])