code: function _getMarkerSize(transform, mMax, lMax) {
      if (transform < mMax) {
          return SIZES.S;
      } else if (transform >= mMax && transform < lMax) {
          return SIZES.M;
      } else {
          return SIZES.L;
      }
  }
docs: This functions returns the proper marker size given the inputs that describe the scenario
  where the marker is to be applied.
  @param {number} transform - the delta zoom value to calculate resize transformations.
  @param {number} mMax - a derived value from the max zoom config.
  @param {number} lMax - a derived value from the min zoom config.
  @returns {string} the size.
  @memberof Marker/helper