addHeaderReportFcn
Add callback function to execute before executing input data in object
Syntax
cgvObj.addHeaderReportFcn(CallbackFcn)
Description
cgvObj.addHeaderReportFcn(CallbackFcn)cgvObjcgvObj is a handle to a cgv.CGV object. run calls CallbackFcn
            before executing input data included in cgvObj. The callback
            function signature is:
CallbackFcn(cgvObj)
Examples
The callback function, HeaderReportFcn,
is added to cgv.CGV object, cgvObj
cgvObj.addHeaderReportFcn(@HeaderReportFcn);
HeaderReportFcn is
defined as:function HeaderReportFcn(cgvObj) ... end