code: public static TreeModelFilter acceptingAll()
      {
          return new TreeModelFilter()
          {
              @Override
              public boolean acceptNode(TreeModel treeModel, TreeNode node)
              {
                  return true;
              }
              
              @Override
              public String toString()
              {
                  return "TreeModelFilter[acceptingAll]";
              }
          };
      }
docs: Returns a {@link TreeModelFilter} that is accepting all nodes.
  
  @return The new {@link TreeModelFilter}