pub fn micro_version() -> u32
Returns the micro version number of the GTK+ library. (e.g. in GTK+ version 3.1.5 this is 5.)
This function is in the library, so it represents the GTK+ library
your code is are running against. Contrast with the
GTK_MICRO_VERSION macro, which represents the micro version of the
GTK+ headers you have included when compiling your code.
the micro version number of the GTK+ library