#include <memory>
#include <iostream>
 
class DataProvider
{
public:
    int x;
};
 
class MyClass
{
public:
    const DataProvider &getDataProvider() const
    {
        return *data;
    }
    void setDataProvider(std::unique_ptr<DataProvider> newData)
    {
        data = std::move(newData);
    }
 
private:
    std::unique_ptr<DataProvider> data;
};
 
int main()
{
    MyClass a;
    std::unique_ptr<DataProvider> provider(new DataProvider{5});
    a.setDataProvider(std::move(provider));
    const DataProvider &otherProvider = a.getDataProvider();
    std::cout << otherProvider.x << std::endl;
}

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