### Prerequisites - [x] I have written a descriptive issue title - [x] I have verified that I am running the latest version of the uml4net - [x] I have searched [open](https://github.com/STARIONGROUP/uml4net/issues) and [closed](https://github.com/STARIONGROUP/uml4net/issues?q=is%3Aissue+is%3Aclosed) issues to ensure it has not already been reported ### Description improve code coverage of the handlebars helper classes ### System Configuration <!-- Tell us about the environment where you are experiencing the bug --> - uml4net version: - [x] uml4net: 1.0.2 <!-- Thanks for reporting the issue to uml4net! -->