public void CanHide_should_throw_exception_if_ui_field()
        {
            var command = new HideField {
                FieldId = 4
            };

            Assert.Throws <DomainException>(() => GuardSchemaField.CanHide(command, schema_0));
        }
        public void CanHide_should_throw_exception_if_locked()
        {
            var command = new HideField {
                FieldId = 1
            };

            var schema_1 = schema_0.UpdateField(1, f => f.Lock());

            Assert.Throws <DomainException>(() => GuardSchemaField.CanHide(command, schema_1));
        }