package org.catacomb.druid.xtext.base;
   
   
   public class Block extends DMItem {
   
       public String idInParent;
   
       Block nextBlock;
       Block previousBlock;
  
  
  
      public Block() {
          idInParent = "none";
      }
  
  
      public void setNext(Block b) {
          nextBlock = b;
          nextBlock.setPrevious(this);
      }
  
      public boolean hasNext() {
          return (nextBlock != null);
      }
  
      public Block next() {
          return nextBlock;
      }
  
  
      private void setPrevious(Block b) {
          previousBlock = b;
      }
  
      public boolean hasPrevious() {
          return (previousBlock != null);
      }
  
      public Block previous() {
          return previousBlock;
      }
  }