interpolate(point, property) {
    const options = this.options;
    const value = point[property];
    const points = this.points;
    const segments = _boundSegments(this, {property, start: value, end: value});

    if (!segments.length) {
      return;
    }

    const result = [];
    const _interpolate = _getInterpolationMethod(options);
    let i, ilen;
    for (i = 0, ilen = segments.length; i < ilen; ++i) {
      const {start, end} = segments[i];
      const p1 = points[start];
      const p2 = points[end];
      if (p1 === p2) {
        result.push(p1);
        continue;
      }
      const t = Math.abs((value - p1[property]) / (p2[property] - p1[property]));
      const interpolated = _interpolate(p1, p2, t, options.stepped);
      interpolated[property] = point[property];
      result.push(interpolated);
    }
    return result.length === 1 ? result[0] : result;
  }
Interpolate a point in this line at the same value on `property` as
the reference `point` provided
@param {PointElement} point - the reference point
@param {string} property - the property to match on
@returns {PointElement|undefined}