How to conditionally set properties on XY bar chart in amCharts v4?

Hi I would like to format my XY Bar chart so that if a data value is 0, instead of showing the bulletLabel for that value in the center of the bar it will show it located at the front of the chart outside. I would like to apply these properties to the bullet label: I would thought about using an adapter, but I am not sure how to write it. Here is my sad attempt: I am not sure how to check the data value or tell it that I want to apply those properties if the data point