code: public static AttributesColumn createColumn(int index, String name,
  			GeoPackageDataType type, boolean notNull, Object defaultValue) {
  		return createColumn(index, name, type, null, notNull, defaultValue);
  	}
docs: Create a new column
  
  @param index
  index
  @param name
  name
  @param type
  data type
  @param notNull
  not null flag
  @param defaultValue
  default value
  @return attributes column