* bt_ctf_field_type_get and bt_ctf_field_type_put: increment and decrement
* the field type's reference count.
*
+ * You may also use bt_ctf_get() and bt_ctf_put() with field type objects.
+ *
* These functions ensure that the field type won't be destroyed while it
* is in use. The same number of get and put (plus one extra put to
* release the initial reference done at creation) have to be done to