如何在子验证中使用父属性？

Question

使用FluentValidation 8.0，我有一个Project类验证器：

public class Project {
  public Boolean Enabled { get; set; }
  public List<Task> Tasks { get; set; }
}

RuleFor(x => x.Tasks)
  .Must(x => x.Count() > 0)
  .ForEach(y => {
     y.SetValidator(z => new InlineValidator<Task> {
       u => u.RuleFor(v => v.Approved)
               .Must((v, c) => ???)
        });
      });

如何访问Enabled的{​​{1}}（???）内Project的属性Must？