l to its (at most) four ortogonally surrounding Cells.
            </td>
          
          
            <td>
            
            </td>
          
          
            <td>
            abc, inmemory, name, self
            </td>
          
        
        </tr>    
      </table>
      <span class="arg">
    
  
    <li>
	  <strong>target</strong>: Another CellularSpace whose Cells will be used to create neighborhoods.
    </li> 
    
  
    <li>
	  <strong>weight</strong>: A function (Cell, Cell)