src/vs/editor/common/model/pieceTreeTextBuffer/pieceTreeTextBuffer.ts/PieceTreeTextBuffer/getValueInRange
class PieceTreeTextBuffer:	public getValueInRange(range: Range, eol: EndOfLinePreference = EndOfLinePreference.TextDefined): string {
		if (range.isEmpty()) {
			return '';
		}

		const lineEnding = this._getEndOfLine(eol);
		return this._pieceTree.getValueInRange(range, lineEnding);
	}