Improve storage

CHDataManagement/Extensions/Sequence+Sorted.swift

@@ -8,4 +8,22 @@ extension Collection {
         }
         return sorted { conversion($0) < conversion($1) }
     }
+
+    func count(where predicate: (Element) throws -> Bool) rethrows -> Int {
+        try reduce(0) { count, element in
+            try predicate(element) ? count + 1 : count
+        }
+    }
+
+    func countThrows(where predicate: (Element) throws -> Void) -> Int {
+        reduce(0) { count, element in
+            do {
+                try predicate(element)
+                return count
+            } catch {
+                return count + 1
+            }
+        }
+
+    }
 }