Add note about fallback

source/RobotAPI/libraries/armem_objects/server/instance/SegmentAdapter.cpp

@@ -608,7 +608,9 @@ namespace armarx::armem::server::obj::instance
 
     void SegmentAdapter::Calibration::defineProperties(PropertyDefinitionsPtr defs, const std::string& prefix)
     {
-        defs->optional(robotName, prefix + "robotName", "Name of robot whose note can be calibrated.");
+        defs->optional(robotName, prefix + "robotName",
+                       "Name of robot whose note can be calibrated.\n"
+                       "If not given, the 'fallbackName' is used.");
         defs->optional(robotNode, prefix + "robotNode", "Robot node which can be calibrated.");
         defs->optional(offset, prefix + "offset", "Offset for the node to be calibrated.");
     }