The class SyringeFilled must inherit of class motor, but syringe dont need to

syringe.h

@@ -5,30 +5,30 @@
 
 #include <ArduinoJson.h>
 
-class Syringe : public Motor
+class Syringe
 {
-    private :
+  private :
 
-    float _total_volume_mL;
-    float _internal_diameter_mm;
-    int _id;
+  float _total_volume_mL;
+  float _internal_diameter_mm;
+  int _id;
 
-    public :
-    
-    //SET METHODS
-    void set_total_volume_mL(float total_volume_mL);
-    void set_internal_diameter_mm(float internal_diameter_mm);
-    void set_id(int id);
+  public :
+  
+  //SET METHODS
+  void set_total_volume_mL(float total_volume_mL);
+  void set_internal_diameter_mm(float internal_diameter_mm);
+  void set_id(int id);
 
-    //GET METHODS
-    float get_total_volume_mL();
-    float get_internal_diameter_mm();
-    int get_id();
+  //GET METHODS
+  float get_total_volume_mL();
+  float get_internal_diameter_mm();
+  int get_id();
 
-    //JSON DOCUMENT
-    StaticJsonDocument<200> SyringeJSON;  //200 = RAM allocated to this document
+  //JSON DOCUMENT
+  StaticJsonDocument<200> SyringeJSON;  //200 = RAM allocated to this document
 
-    void setupJsonSyringe( float total_volume_mL, float internal_diameter_mm, int id);
+  void setupJsonSyringe( float total_volume_mL, float internal_diameter_mm, int id);
 
 };
 

syringefilled.h

@@ -3,7 +3,7 @@
 #include "syringe.h"
 #include <ArduinoJson.h>
 
-class SyringeFilled
+class SyringeFilled : Motor
 {