public virtual InternalKeyBuilder Key([CanBeNull] IReadOnlyList <Property> properties, ConfigurationSource configurationSource)
{
if (properties == null ||
!properties.Any())
{
return(null);
}
foreach (var property in properties)
{
_propertyBuilders.UpdateConfigurationSource(property, configurationSource);
}
return(_keyBuilders.GetOrAdd(
() => Metadata.FindKey(properties),
() => Metadata.AddKey(properties),
key => new InternalKeyBuilder(key, ModelBuilder),
ModelBuilder.ConventionDispatcher.OnKeyAdded,
configurationSource));
}
