src/vs/editor/common/model/pieceTreeTextBuffer/pieceTreeBase.ts/PieceTreeSearchCache/get
class PieceTreeSearchCache:	public get(offset: number): CacheEntry | null {
		for (let i = this._cache.length - 1; i >= 0; i--) {
			const nodePos = this._cache[i];
			if (nodePos.nodeStartOffset <= offset && nodePos.nodeStartOffset + nodePos.node.piece.length >= offset) {
				return nodePos;
			}
		}
		return null;
	}