Function cplex_rs_sys::CPXcallbacksetuserhandle

pub unsafe extern "C" fn CPXcallbacksetuserhandle(
    env: CPXCENVptr,
    cbdata: *mut c_void,
    wherefrom: c_int,
    userhandle: *mut c_void,
    olduserhandle_p: *mut *mut c_void
) -> c_int