getPointsHoles( divisions ) {

		const holesPts = [];

		for ( let i = 0, l = this.holes.length; i < l; i ++ ) {

			holesPts[ i ] = this.holes[ i ].getPoints( divisions );

		}

		return holesPts;

	}
Returns an array representing each contour of the holes
as a list of 2D points.

@param {number} divisions - The fineness of the result.
@return {Array<Array<Vector2>>} The holes as a series of 2D points.