The basemap id, use JMap.Map.Basemap.getAllId() to get available basemap ids
Error if basemap not found for the given id
// Activate the basemap "streets"
JMap.Map.Basemap.activateById("streets")
// Deactivate current basemap
JMap.Map.Basemap.deactivate()
JMap.Map.Basemap.activateById
Apply the basemap on the map.