question: public void ensureAtLeast ( AxisSpace space ) { this . top = Math . max ( this . top , space . top ) ; this . bottom = Math . max ( this . bottom , space . bottom ) ; this . left = Math . max ( this . left , space . left ) ; this . right = Math . max ( this . right , space . right ) ; }
target:  Ensures that this object reserves at least as much space as another.