カスタム製品エンティティの実装

entity.Manufacturers = this.PopulateEntityFieldCollections(
entityItem,
"Manufacturer",
typeof(Manufacturer),
new Dictionary<string, string> { { "ExternalId", "ExternalID" }, { "Name", "Name" }, { "Description", "Description" } })
.Cast<Manufacturer>().ToList();

The actual manufacturer type should be created by calling the Create method on the type Sitecore.Commerce.Entities.EntityFactory, but this is left out to simplify the example.
The PopulateEntityFieldCollections method has the following signature:

/// <summary>
/// Fills the entity collections.
/// </summary>
/// <param name="entityItem">The entity item.</param>
/// <param name="fieldName">Name of the field.</param>
/// <param name="collectionMemberType">Type of the collection member.</param>
/// <param name="properties">The properties.</param>
/// <returns>
/// The collection of the product entities.
/// </returns>

private IEnumerable<ProductEntity> PopulateEntityFieldCollections(Item entityItem, string fieldName, Type collectionMemberType, IDictionary<string, string> properties)