Something strange in the docs

[Michael <space3000 gmail com>]

Hello.
 Consider those page:
http://library.gnome.org/devel/glibmm/stable/deprecated.html#_deprecated000002
http://library.gnome.org/devel/glibmm/stable/classGio_1_1MemoryInputStream.html#aa26832ff7a8bce5cc15518d5a2f0a14b

They say that add_data is deprecated and that the version with destroy notification should be used,
but I don't see any other version with destroy notification. May be I don't understand something...
Could anyone clarify?