✅ why ArgumentException.ThrowIfNullOrEmpty(); is only for string?

public class A
{
       A(AnotherClass AC)
      {
            // how to check AC for null?
             var vc = new Test(AC);
      }
}

public class A
{
       A(AnotherClass AC)
      {
            // how to check AC for null?
             var vc = new Test(AC);
      }
}