pub unsafe extern "C" fn proj_create_conversion_pole_rotation_netcdf_cf_convention(
    ctx: *mut PJ_CONTEXT,
    grid_north_pole_latitude: f64,
    grid_north_pole_longitude: f64,
    north_pole_grid_longitude: f64,
    ang_unit_name: *const c_char,
    ang_unit_conv_factor: f64,
) -> *mut PJ