Client side filter in table column for not null value

Summary:

I am using table with ADP data and using ojlistdataproviderview to do client side filter. It's working fine. But user wants to filter column for null value. want to check how we can achieve it?

Content (required):

I am using table with ADP data and using ojlistdataproviderview to do client side filter. It's working fine. But user wants to filter column for null value. want to check how we can achieve it?

Version (include the version you are using, if applicable):

VBS Fusion embedded

Code Snippet (add any code snippets that support your topic, if applicable):

    createLDPV(poDashboardArray, filter) {