function _swapReserve() {
    var f = state.reserve;
    state.reserve = state.next;
    state.next = f;
    if(state.next === TRIPLE_FIG.EMPTY) 
      state.next = newNextFigure();
    emit('swapreserve');
  }
// swapReserve() swap reserve and next figure
swapReserve() swap reserve and next figure
swapReserve () swap reserve and next figure
function _swapReserve() {
    var f = state.reserve;
    state.reserve = state.next;
    state.next = f;
    if(state.next === TRIPLE_FIG.EMPTY) 
      state.next = newNextFigure();
    emit('swapreserve');
  }
function _swapReserve ( ) { var f = state . reserve ; state . reserve = state . next ; state . next = f ; if ( state . next === TRIPLE_FIG . EMPTY ) state . next = newNextFigure ( ) ; emit ( 'swapreserve' ) ; }
swapReserve() swap reserve and next figure
swapReserve () swap reserve and next figure