Function libsolv_sys::ffi::pool_setnamespacecallback

pub unsafe extern "C" fn pool_setnamespacecallback(
    pool: *mut Pool, 
    cb: Option<unsafe extern "C" fn(arg1: *mut s_Pool, arg2: *mut c_void, arg3: Id, arg4: Id) -> Id>, 
    nscbdata: *mut c_void
)