Function xgboost_sys::XGDMatrixGetUIntInfo

pub unsafe extern "C" fn XGDMatrixGetUIntInfo(
    handle: DMatrixHandle,
    field: *const c_char,
    out_len: *mut bst_ulong,
    out_dptr: *mut *const c_uint
) -> c_int

\brief get uint32 info vector from matrix \param handle a instance of data matrix \param field field name \param out_len The length of the field. \param out_dptr pointer to the result \return 0 when success, -1 when failure happens