 
         self.isExecuting = true
 
-        Self.log("Started")
+        self.log("Started")
         self.begin {
             self.finish()
         }

        self.isExecuting = false
        self.isFinished = true

        Self.log("Cancelled")
    }

    /// Overriden by subclasses to define the body of the operation


    // MARK: -

    private func log(_ message: String) {
        Logger.debug("\(type(of: self)): \(message)")
    }

