code: private static List<UserCustomColumn> createColumns() {
  
  		List<UserCustomColumn> columns = new ArrayList<>();
  		columns.addAll(createRequiredColumns());
  
  		int index = columns.size();
  		columns.add(UserCustomColumn
  				.createColumn(index++, COLUMN_GEOMETRY_TYPE_NAME,
  						GeoPackageDataType.TEXT, false, null));
  
  		return columns;
  	}
docs: Create the style mapping columns
  
  @return columns