src/vs/editor/common/diff/smartLinesDiffComputer.ts/LineSequence/getElements
class LineSequence:	public getElements(): Int32Array | number[] | string[] {
		const elements: string[] = [];
		for (let i = 0, len = this.lines.length; i < len; i++) {
			elements[i] = this.lines[i].substring(this._startColumns[i] - 1, this._endColumns[i] - 1);
		}
		return elements;
	}