code: function findPoiBetweenSegmentAndPlaneRegion(poi, segment, planeVertex1, planeVertex2, planeVertex3,
                                               planeVertex4) {
    return findPoiBetweenSegmentAndTriangle(poi, segment, planeVertex1, planeVertex2, planeVertex3) ||
        findPoiBetweenSegmentAndTriangle(poi, segment, planeVertex1, planeVertex3, planeVertex4);
  }
docs: Finds the point of intersection between a line segment and a coplanar quadrilateral.
  
  This assumes the region is not degenerate (has non-zero side lengths).
  
  @param {vec3} poi Output param. Null if there is no intersection.
  @param {LineSegment} segment
  @param {vec3} planeVertex1
  @param {vec3} planeVertex2
  @param {vec3} planeVertex3
  @param {vec3} planeVertex4
  @returns {boolean} True if there is an intersection.