/// <summary>
/// Serialized a map. The default implementation first ensure that the value is indeed a map and then uses
/// GetMapSize() and GetMapElements() to access the contents of the map.
/// </summary>
/// <param name="schema">The MapSchema for serialization</param>
/// <param name="value">The value to be serialized</param>
/// <param name="encoder">The encoder for serialization</param>
protected void WriteMap(WriteItem itemWriter, object value, Encoder encoder)
{
_mapAccess.EnsureMapObject(value);
encoder.WriteMapStart();
encoder.SetItemCount(_mapAccess.GetMapSize(value));
_mapAccess.WriteMapValues(value, itemWriter, encoder);
encoder.WriteMapEnd();
}
