Rework storage structs, link preview

CHDataManagement/Extensions/String+Extensions.swift

@@ -120,6 +120,14 @@ extension String {
     }
 }
 
+extension String {
+
+    func removingPrefix(_ prefix: String) -> String? {
+        guard self.hasPrefix(prefix) else { return nil }
+        return String(self.dropFirst(prefix.count))
+    }
+}
+
 extension String {
 
     var fileNameWithoutExtension: String {