libsbmlcs.SBMLDocument.getError C# (CSharp) Метод

        public SBMLError getError(long n)
        {
            IntPtr cPtr = libsbmlPINVOKE.SBMLDocument_getError(swigCPtr, n);
            SBMLError ret = (cPtr == IntPtr.Zero) ? null : new SBMLError(cPtr, false);
            return ret;
        }

 public void test_internal_consistency_check_20306()
 {
     SBMLDocument d = new SBMLDocument(3,1);
       long errors;
       Model m = d.createModel();
       FunctionDefinition fd = m.createFunctionDefinition();
       fd.setId("fd");
       errors = d.checkInternalConsistency();
       assertTrue( errors == 1 );
       assertTrue( d.getError(0).getErrorId() == 20306 );
       ASTNode ast = libsbml.parseFormula("lambda(x, 2*x)");
       fd.setMath(ast);
       errors = d.checkInternalConsistency();
       assertTrue( errors == 0 );
       d = null;
 }