PFNGLSTOPINSTRUMENTSSGIXPROCDart typedef
        PFNGLSTOPINSTRUMENTSSGIXPROCDart =
     void Function(int marker)
    
    
    
Implementation
typedef PFNGLSTOPINSTRUMENTSSGIXPROCDart = void Function(int marker);typedef PFNGLSTOPINSTRUMENTSSGIXPROCDart = void Function(int marker);