src/vs/workbench/services/workingCopy/common/workingCopyHistoryService.ts/WorkingCopyHistoryService/getModel
class WorkingCopyHistoryService:	private async getModel(resource: URI): Promise<WorkingCopyHistoryModel> {
		const historyHome = await this.localHistoryHome.p;

		let model = this.models.get(resource);
		if (!model) {
			model = new WorkingCopyHistoryModel(resource, historyHome, this._onDidAddEntry, this._onDidChangeEntry, this._onDidReplaceEntry, this._onDidRemoveEntry, this.getModelOptions(), this.fileService, this.labelService, this.logService, this.configurationService);
			this.models.set(resource, model);
		}

		return model;
	}