using System;
 
public class Test
{
	public static void Main()
	{
		var sta = new SomeType<A>();
		sta.Do(new A());
	}
}
 
public class SomeType<T> where T : Z
{
	public void Do(T t)
	{
		t.Foo();
		t.Bar();
	}
}
 
public interface X { void Foo(); }
 
public interface Y { void Bar(); }
 
public interface Z : X, Y { }
 
public class A : Z
{
    public void Foo() {}
    public void Bar() {}
}
 
public class B : Z
{
    public void Foo() {}
    public void Bar() {}
}

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