/// <summary>
/// Check if property is not null or empty.
/// </summary>
/// <returns>Current instance.</returns>
public PropertyValidator <TRow> IsNotNullOrEmpty()
{
StringRule <TRow> method = new StringRule <TRow>((x) => this.getter(x));
method.IsNotNullOrEmpty();
this.validationRules.Add(method);
return(this);
}