src/vs/editor/common/viewModel/viewModelLines.ts/ViewModelLinesFromProjectedModel/acceptVersionId
class ViewModelLinesFromProjectedModel:	public acceptVersionId(versionId: number): void {
		this._validModelVersionId = versionId;
		if (this.modelLineProjections.length === 1 && !this.modelLineProjections[0].isVisible()) {
			// At least one line must be visible => reset hidden areas
			this.setHiddenAreas([]);
		}
	}