https://github.com/Microsoft/mssql-jdbc: Microsoft JDBC Driver for SQL Server. (Microsoft Corporation) 
package mssql.googlecode.concurrentlinkedhashmap;

import java.util.Deque;


An element that is linked on the Deque. 
/**
 * An element that is linked on the {@link Deque}.
 */
interface Linked<T extends Linked<T>> {

  
Retrieves the previous element or null if either the element is
unlinked or the first element on the deque.

/**
   * Retrieves the previous element or <tt>null</tt> if either the element is
   * unlinked or the first element on the deque.
   */
  T getPrevious();

  
Sets the previous element or null if there is no link. 
/** Sets the previous element or <tt>null</tt> if there is no link. */
  void setPrevious(T prev);

  
Retrieves the next element or null if either the element is
unlinked or the last element on the deque.

/**
   * Retrieves the next element or <tt>null</tt> if either the element is
   * unlinked or the last element on the deque.
   */
  T getNext();

  
Sets the next element or null if there is no link. 
/** Sets the next element or <tt>null</tt> if there is no link. */
  void setNext(T next);
}