src/vs/editor/contrib/find/findModel.ts/FindModelBoundToEditorModel/_getSearchRange
class FindModelBoundToEditorModel:	private static _getSearchRange(model: ITextModel, findScope: Range | null): Range {
		// If we have set now or before a find scope, use it for computing the search range
		if (findScope) {
			return findScope;
		}

		return model.getFullModelRange();
	}