/// <summary>
/// Gets the attribute definitions.
/// </summary>
/// <param name="btr">The BTR.</param>
/// <param name="mode">The mode.</param>
/// <param name="includingErased">if set to <c>true</c> [including erased].</param>
/// <param name="openObjectsOnLockedLayers">if set to <c>true</c> [open objects on locked layers].</param>
/// <returns></returns>
public static IEnumerable <AttributeDefinition> GetAttributeDefinitions(this BlockTableRecord btr,
OpenMode mode = OpenMode.ForRead, bool includingErased = false, bool openObjectsOnLockedLayers = false)
{
return(btr.GetAttributeDefinitions(btr.Database.TransactionManager.TopTransaction, mode, includingErased,
openObjectsOnLockedLayers));
}