第 56 题：要求设计 LazyMan 类，实现以下功能。

LazyMan("Tony");
// Hi I am Tony

LazyMan("Tony")
  .sleep(10)
  .eat("lunch");
// Hi I am Tony
// 等待了10秒...
// I am eating lunch

LazyMan("Tony")
  .eat("lunch")
  .sleep(10)
  .eat("dinner");
// Hi I am Tony
// I am eating lunch
// 等待了10秒...
// I am eating diner

LazyMan("Tony")
  .eat("lunch")
  .eat("dinner")
  .sleepFirst(5)
  .sleep(10)
  .eat("junk food");
// Hi I am Tony
// 等待了5秒...
// I am eating lunch
// I am eating dinner
// 等待了10秒...
// I am eating junk food