Note that the font maintains a <firstterm>weak</firstterm> reference
to the font map, so if all references to font map are dropped, the font
map will be finalized even if there are fonts created with the font
map that are still alive. In that case this function will return %NULL.
It is the responsibility of the user to ensure that the font map is kept
alive. In most uses this is not an issue as a #PangoContext holds
a reference to the font map.
Gets the font map for which the font was created.
Note that the font maintains a <firstterm>weak</firstterm> reference to the font map, so if all references to font map are dropped, the font map will be finalized even if there are fonts created with the font map that are still alive. In that case this function will return %NULL. It is the responsibility of the user to ensure that the font map is kept alive. In most uses this is not an issue as a #PangoContext holds a reference to the font map.