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  | using System; 
 |  using System.Collections.Generic; 
 |  using System.Linq; 
 |  using System.Text; 
 |  using System.Threading.Tasks; 
 |    
 |  namespace SyntacticSugar.constant 
 |  { 
 |      public static class EmptyConstant 
 |      { 
 |          /// <summary> 
 |          /// 空 
 |          /// </summary> 
 |          public static int EMPTY = 0; 
 |      } 
 |  } 
 |  
  |