pub unsafe extern "C" fn gtk_source_region_subtract_subregion(
region: *mut GtkSourceRegion,
_start: *const GtkTextIter,
_end: *const GtkTextIter,
)
pub unsafe extern "C" fn gtk_source_region_subtract_subregion(
region: *mut GtkSourceRegion,
_start: *const GtkTextIter,
_end: *const GtkTextIter,
)