public override bool Test(object lhs, object rhs) => !TemplateDefaultFilters.isFalsy(lhs) && !TemplateDefaultFilters.isFalsy(rhs);
public override object Evaluate(object target) => TemplateDefaultFilters.isFalsy(target);
public override object Evaluate(object lhs, object rhs) => TemplateDefaultFilters.isFalsy(lhs) ? rhs : lhs;