gtkTextBufferDeserializeSetCanCreateTags(object, format, can.create.tags)objectformatGdkAtom representing a registered rich text formatcan.create.tagsgtkTextBufferRegisterDeserializeTagset,
because that format is essentially a dump of the internal structure
of the source buffer, including its tag names.
You should allow creation of tags only if you know what you are
doing, e.g. if you defined a tagset name for your application
suite's text buffers and you know that it's fine to receive new
tags from these buffers, because you know that your application can
handle the newly created tags.
Since 2.10