code: function _shouldTrigger (keydownThis, keydownNext) {
        if (!(keydownNext && keydownNext.event && !keydownThis.event)) return false;
  
        return ( keySets.some( keySet => matchKeys( { keySet, event: keydownNext.event } ) ) )
      }
docs: _shouldTrigger
  
  @access private
  @param {object} thisProps Exsting props from the wrapped component
  @param {object} thisProps.keydown The namespaced state from the higher-order
  component (class_decorator)
  @param {object} nextProps The incoming props from the wrapped component
  @param {object} nextProps.keydown The namescaped state from the higher-order
  component (class_decorator)
  @param {array} keys The keys bound to the decorated method
  @return {boolean} Whether all tests have passed