How to call a module function in a widget?

[Remitur]

Problem:

• I'm writing a widget for admin area
• this widget need to call a function, defined in a registrar module (i.e. MyCustomRegistrarModule_myfunction() )

If I call it directly inside the widget, I'm obviously getting a "nice "Oops!" message ("Error: Call to undefined function WHMCS\Module\Widget\MyCustomRegistrarModule_myfunction()")

I could replicate the function inside the widget, redefining it, but I guess that there's some kind of better and smarter way to do it... 

[steven99]

Include once includes/registrarfunctions.php and then call the module function via MyCustomRegistrarModule_myfunction($params) ;  registrarfunctions.php should be loading the registrar modules and the function will then be available.  Just do a function_exists check first .