symtable works but not multiple variable

src/main/java/TP2/asd/SymTable.java

@@ -45,4 +45,15 @@ public class SymTable {
         }
         return false;
     }
+
+    public String print_all(){
+        StringBuilder str = new StringBuilder();
+        for(int i= stackMap.size()-1; i>=0; i--){
+            str.append("level ").append(i).append("\n");
+            for(String s: stackMap.get(i).keySet()){
+                str.append(s).append(" ").append(stackMap.get(i).get(s)).append("\n");
+            }
+        }
+        return str.toString();
+    }
 }