Passing null arguments using the undefined variable called something like nullArg does not seem to work for me any more

I have upgraded to use Freemarker 2.3.17 and am finding that passing null
arguments using the undefined variable nullArg does not seem to work for me
any more.  In particular I am finding that Freemarker cannot match up a
function call where some of the parameters have null values (given as
nullArg variables that have not been previously defined) to any existing
method signature.  Is there some change that I should be adapting my
templates to?

Regards

Geoff S

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