code: function( hidePoint ) {
              return ["_M", hidePoint.x, ",", hidePoint.y, 'L', hidePoint.x, ",", hidePoint.y, hidePoint.x, ",", hidePoint.y].join(' ');
          }
docs: Create the path which is represented as a point, used for hiding the connection
  A path with a leading "_" indicates the path will be hidden
  See: http://dmitrybaranovskiy.github.io/raphael/reference.html#Paper.path
  @param {object} hidePoint
  @returns {string}