libsbml.Model.addSpeciesType C# (CSharp) Method

        public int addSpeciesType(SpeciesType st)
        {
            int ret = libsbmlPINVOKE.Model_addSpeciesType(swigCPtr, SpeciesType.getCPtr(st));
            return ret;
        }

 public void test_Model_addSpeciesType4()
 {
     Model m = new  Model(2,2);
       SpeciesType st = new  SpeciesType(2,2);
       st.setId( "st");
       SpeciesType st1 = new  SpeciesType(2,2);
       st1.setId( "st");
       int i = m.addSpeciesType(st);
       assertTrue( i == libsbml.LIBSBML_OPERATION_SUCCESS );
       assertTrue( m.getNumSpeciesTypes() == 1 );
       i = m.addSpeciesType(st1);
       assertTrue( i == libsbml.LIBSBML_DUPLICATE_OBJECT_ID );
       assertTrue( m.getNumSpeciesTypes() == 1 );
       st = null;
       st1 = null;
       m = null;
 }