/// Interface for objects which are meant to be written to a table in a SQL database.
abstract class SQLWritable {
  const SQLWritable();

  /// Returns a map of the object's properties and their values.
  ///
  /// Note that there might be properties in the object which is meant to be
  /// inserted into a different table. These properties will/should be excluded
  /// from this map.
  Map<String, Object?> get sqlValue;
}