src/vs/editor/contrib/folding/foldingModel.ts/FoldingModel/constructor
class FoldingModel:	constructor(textModel: ITextModel, decorationProvider: IDecorationProvider) {
		this._textModel = textModel;
		this._decorationProvider = decorationProvider;
		this._regions = new FoldingRegions(new Uint32Array(0), new Uint32Array(0));
		this._editorDecorationIds = [];
		this._isInitialized = false;
	}