Function geos_sys::GEOSSTRtree_nearest_generic_r

pub unsafe extern "C" fn GEOSSTRtree_nearest_generic_r(
    handle: GEOSContextHandle_t,
    tree: *mut GEOSSTRtree,
    item: *const c_void,
    itemEnvelope: *const GEOSGeometry,
    distancefn: GEOSDistanceCallback,
    userdata: *mut c_void
) -> *const c_void