Index: sources/model/hd/data/MTreatmentFlowsData.h
===================================================================
diff -u -r3aab84456cfbdc4c4f495975ba9b8968eb844309 -raa0772fe1b0ff6b07e9f64e8c38acad66ad5468d
--- sources/model/hd/data/MTreatmentFlowsData.h	(.../MTreatmentFlowsData.h)	(revision 3aab84456cfbdc4c4f495975ba9b8968eb844309)
+++ sources/model/hd/data/MTreatmentFlowsData.h	(.../MTreatmentFlowsData.h)	(revision aa0772fe1b0ff6b07e9f64e8c38acad66ad5468d)
@@ -21,6 +21,9 @@
 #include "MAbstract.h"
 #include "types.h"
 
+// forward declarations
+class tst_models;
+
 namespace Model {
 
 /*!
@@ -56,6 +59,9 @@
  */
 class MBloodFlow : public MFlow {
 
+    // friends
+    friend class ::tst_models;
+
 public:
     QString      infoText  () const override { return QString("BloodFlow"); }
 
@@ -79,6 +85,9 @@
  */
 class MDialysateFlow : public MFlow {
 
+    // friends
+    friend class ::tst_models;
+
 public:
     QString      infoText  () const override { return QString("DialysateFlow"); }