public abstract TRes Accept <TRes, TArg>(IExprTypeVisitor <TRes, TArg> visitor, TArg arg);
public override TRes Accept <TRes, TArg>(IExprTypeVisitor <TRes, TArg> visitor, TArg arg) => visitor.VisitExprTypeInt64(this, arg);
public override TRes Accept <TRes, TArg>(IExprTypeVisitor <TRes, TArg> visitor, TArg arg) => visitor.VisitExprTypeFixSizeByteArray(this, arg);