/// <summary>
/// Returns an owner using a componentId.
/// Uses IOwnershipCache to speed up lookup.
/// </summary>
/// <param name="cache">IOwnershipCache is cached Ownership table.</param>
/// <param name="componentId">Id string of the component.</param>
/// <returns>String as owner (email).</returns>
public static async Task <string> GetOwner(this IOwnershipCache cache, string componentId)
{
var entries = await cache.GetEntries();
IComponentId id = ComponentId.ComponentIdFactory(componentId);
// more detailed component Id should be selected,
// for this reason we first query the identity on object level.
var objectOwner = entries.FirstOrDefault(x => x.ComponentId == id.ObjectLevel);
if (!objectOwner.Equals(default) && !string.IsNullOrEmpty(objectOwner.Owner))
