[ Version ( since = "2.8" ) ]
public uint get_major_version ()
Returns the major version number of the ATK library.
(e.g. in ATK version 2.7.4 this is 2.)
This function is in the library, so it represents the ATK library your code is running against. In contrast, the MAJOR_VERSION macro represents the major version of the ATK headers you have included when compiling your code.
the major version number of the ATK library