How to import SamplePulse

Hi,
I am at oage 193 of the book Learn Quantum Computing with python and IBM.
This is the source code:

from qiskit.pulse import DriveChannel, Play, Schedule, SamplePulse
#Import same helpful utils
from qiskit.scheduler.utils import measure_all

I got this error and I can not find the solution anywhere.

Traceback (most recent call last):
Input In [13] in <cell line: 10>
from qiskit.pulse import DriveChannel, Play, Schedule, SamplePulse
ImportError: cannot import name ‘SamplePulse’ from ‘qiskit.pulse’ (/opt/conda/lib/python3.8/site-packages/qiskit/pulse/init.py)

Any idea?

regards,

Chiel