public override void SetUp()
{
base.SetUp();
_add = NormalizingMemberInfoFromExpressionUtility.GetMethod((DomainType obj) => obj.Add(7, 8));
_method = NormalizingMemberInfoFromExpressionUtility.GetMethod((DomainType obj) => obj.Method(7));
_multiply = NormalizingMemberInfoFromExpressionUtility.GetMethod(() => DomainType.Multiply(7, 8));
}