pub type GDALContourWriter = Option<unsafe extern "C" fn(dfLevel: f64, nPoints: c_int, padfX: *mut f64, padfY: *mut f64, arg1: *mut c_void) -> Type>;Aliased Type§
pub enum GDALContourWriter {
None,
Some(unsafe extern "C" fn(f64, i32, *mut f64, *mut f64, *mut c_void) -> u32),
}