def METHOD_NAME(kind, N):
    if kind == "qeye":
        out = qeye(N)
    elif kind == "destroy":
        out = destroy(N)
    elif kind == "destroy2":
        out = destroy(N)**2
    elif kind == "tridiag":
        out = destroy(N) + num(N) + create(N)
    elif kind == "td":
        out = [num(N), [destroy(N) + create(N), lambda t: 1 + t]]
    elif kind == "rand":
        out = rand_herm(N)
    return QobjEvo(out)