c_gtk_source_region_intersect_subregion

Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
extern (C) __gshared
GtkSourceRegion* function(GtkSourceRegion* region, GtkTextIter* Start, GtkTextIter* End) c_gtk_source_region_intersect_subregion;

Meta