public static WorkflowDescriptor load(final InputStream is, boolean validate) throws SAXException, IOException, InvalidWorkflowDescriptorException { return load(is, null, validate);
public static WorkflowDescriptor load(final InputStream is) throws SAXException, IOException, InvalidWorkflowDescriptorException { return load(is, null, true);
    public static WorkflowDescriptor load(final InputStream is, boolean validate) throws SAXException, IOException, InvalidWorkflowDescriptorException {        return load(is, null, validate);    }