src/vs/editor/common/model/pieceTreeTextBuffer/pieceTreeTextBufferBuilder.ts/PieceTreeTextBufferBuilder/_acceptChunk1
class PieceTreeTextBufferBuilder:	private _acceptChunk1(chunk: string, allowEmptyStrings: boolean): void {
		if (!allowEmptyStrings && chunk.length === 0) {
			// Nothing to do
			return;
		}

		if (this._hasPreviousChar) {
			this._acceptChunk2(String.fromCharCode(this._previousChar) + chunk);
		} else {
			this._acceptChunk2(chunk);
		}
	}