Classes
 ClassDescription
 IBBCloseExtension XEP-0047: In-Band Bytestreams, Version 2.0 (2012-06-22) Close the communication once transfer is complete.
 IBBDataExtension XEP-0047: In-Band Bytestreams, Version 2.0 (2012-06-22) Each chunk of data is contained in a data element qualified by the 'http://jabber.org/protocol/ibb' namespace.
 IBBExtension XEP-0047: In-Band Bytestreams, Version 2.0 (2012-06-22) Base class of all IBB classes that are using same namespace.
 IBBOpenExtension XEP-0047: In-Band Bytestreams, Version 2.0 (2012-06-22) Open the communication It is RECOMMENDED to send IBB data using IQ stanzas instead of message stanzas because IQ stanzas provide feedback to the sender regarding delivery to the recipient).