Result DBO print helper method

src/DBO/Result.h

     template<class U>
     friend std::ostream& operator<<(std::ostream& os, const Result<U>& res);
 
+    const Result<T>& print() const;
+
 private:
     Result();
 

src/DBO/Result.hxx

         os << "Error: " << (res._error.empty() ? "Unknown error" : res._error);
     }
     return os;
+}
+
+template<class T>
+const Result<T>& Result<T>::print() const
+{
+    (_success ? std::cout : std::cerr) << *this << std::endl;
+    return *this;
 }