libsbml.Model.addFunctionDefinition C# (CSharp) Method

        public int addFunctionDefinition(FunctionDefinition fd)
        {
            int ret = libsbmlPINVOKE.Model_addFunctionDefinition(swigCPtr, FunctionDefinition.getCPtr(fd));
            return ret;
        }

 public void test_Model_addFunctionDefinition4()
 {
     Model m = new  Model(2,2);
       FunctionDefinition fd = new  FunctionDefinition(2,2);
       fd.setId( "fd");
       fd.setMath(libsbml.parseFormula("fd"));
       FunctionDefinition fd1 = new  FunctionDefinition(2,2);
       fd1.setId( "fd");
       fd1.setMath(libsbml.parseFormula("fd"));
       int i = m.addFunctionDefinition(fd);
       assertTrue( i == libsbml.LIBSBML_OPERATION_SUCCESS );
       assertTrue( m.getNumFunctionDefinitions() == 1 );
       i = m.addFunctionDefinition(fd1);
       assertTrue( i == libsbml.LIBSBML_DUPLICATE_OBJECT_ID );
       assertTrue( m.getNumFunctionDefinitions() == 1 );
       fd = null;
       fd1 = null;
       m = null;
 }