How to set a dropdown to the blank line value

Hi all,
maybe a very easy question.
How can I set a dropdownbyindex value to the blank line?
If I use e.g.
wdContext.currentActionsElement().setDescription(null);
it adds another blank line among the values and if I try with:
wdContext.nodeActions().setLeadSelection(0);
it doesn't work.
Any suggestion?
Thanks in advance.
Angelo

wdContext.nodeActions().setLeadSelection(IWDNode.NO_SELECTION);
Check that node selection is not mandatory (i.e. selection cardinality is 0..1, not 1..1).
If this does not help set initializeLeadSelection to false for this node.
VS

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