Dynamics 365 Business Central: How to check if there is only one value in the filter for a field (For example, check if number of G/L Account No. filter is greater than 1)

Today I would like to talk about an interesting question I was asked before, is there any way to check if there is only one value in the filter for a field, for example, check if number of G/L Account No. filter is greater than 1.

Source : Dynamics 365 Lab
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