sorted out `__toString()`

src/QueryBuilder/DirectoryQuery/DirectoryQuery.php

@@ -12,6 +12,10 @@ final class DirectoryQuery
     {
         $this->QueryString = $queryString;
     }
+    public function __toString()
+    {
+        return $this->QueryString;
+    }
 
     public function RunQuery(DeegraphServer $server): DirectoryQueryResponse
     {

src/QueryBuilder/InsertQuery/InsertQuery.php

@@ -23,4 +23,8 @@ final class InsertQuery
         if($queryBuilder->Replace)              $builder .= "REPLACE";
 
     }
+    public function __toString()
+    {
+        return $this->QueryString;
+    }
 }

src/QueryBuilder/ReferencesQuery/ReferencesQuery.php

@@ -12,6 +12,10 @@ final class ReferencesQuery
     {
         $this->QueryString = $queryString;
     }
+    public function __toString()
+    {
+        return $this->QueryString;
+    }
 
     public function RunQuery(DeegraphServer $server): ReferencesQueryResponse
     {