1 files changed, 3 insertions, 0 deletions
diff --git a/src/labeller.h b/src/labeller.h
index cf108f5..37a2eda 100644
--- a/src/labeller.h
+++ b/src/labeller.h
@@ -13,6 +13,9 @@ namespace backend {
         bool nonzero() const {
             return (x1 != 0 || x1 != 0 || y1 != 0 || y2 != 0);
         }
+        std::string string() {
+            return std::to_string(x1) + "," + std::to_string(y1) + "," + std::to_string(x2) + "," + std::to_string(y2);
+        }
     };
 
     struct label {