property Items [AIndex: Integer]: TIdFTPListItem;

Items is a TIdFTPListItem property that provides indexed access to TIdFTPListItem instances maintained in the structured directory listing collection. 

Items provides both read and write access to collection items using their zero-based ordinal position in the collection. 

Items is the default property for the TIdFTPListItems collection. 

Use IndexOf to locate a specific object instance in the collection. 

Use Add, Delete, and Clear to maintain the items in the collection.