I set the code within the Mappress admin window on my sites so nothing shows, but Google has perfect example if anyone goes to the Google map styler at…
…then go to a shopping mall or paste this in the location field…
Bellis Fair Pkwy Bellingham, WA
…then on the left, under ‘feature type’ click ‘point of interest’, then ‘business’ and when they are highlighted go down to ‘visibility’ and click ‘off’.
That sets the JSON code to turn off the business POIs but if you zoom to the mall area you can see ‘laura’s alterations’ and other markers if you move around the map.
Hope that helps,