code: function _computeMarkerId(highlight, transform, { maxZoom }) {
      const mMax = maxZoom / 4;
      const lMax = maxZoom / 2;
      const size = _getMarkerSize(transform, mMax, lMax);
      const highlighted = highlight ? HIGHLIGHTED : "";
      const markerKey = _markerKeyBuilder(size, highlighted);
  
      return MARKERS[markerKey];
  }
docs: This function holds logic to retrieve the appropriate marker id that reflects the input
  parameters, markers can vary with highlight and transform value.
  @param {boolean} highlight - tells us whether or not some element (link or node) is highlighted.
  @param {number} transform - the delta zoom value to calculate resize transformations.
  @param {Object} config - the graph config object.
  @returns {string} the id of the result marker.
  @memberof Marker/helper