src/main/optional/appeng/api/movable/IMovableTile.java

package appeng.api.movable;

/**
 * You can implement this, or use the IMovableRegistry o white list your tile, please see the registry for more information.
 */
public interface IMovableTile {
	
	/**
	 * notification that your block will be moved, called instead of invalidate, return false to prevent movement.
	 * @return 
	 */
	boolean prepareToMove();
	
	/**
	 * notification that your block was moved, called after validate.
	 */
	void doneMoving();
	
}