BadFunc(
    message: $"abc",
    value2: 0,
    value1: 1);
 
static void BadFunc(
    ref InterpolatedStringHandler message,
    in int? value1,
    int? value2)
{
}
 
[System.Runtime.CompilerServices.InterpolatedStringHandler]
public ref struct InterpolatedStringHandler
{
    public InterpolatedStringHandler(
        int literalLength,
        int formattedCount)
    {
 
    }
 
    public void AppendLiteral(string value)
    {
    }
}