Are DBSCAN and dbscan from the sklearn.cluster package different?

Question

I'm new to DBSCAN. I was looking at a few examples online and came across a few instances where the following lines were used while importing the dbscan module:

from sklearn.cluster.dbscan_ import DBSCAN
from sklearn.cluster.dbscan_ import dbscan

I would like to know if there is anything different between them? Or is it necessary for me to import both DBSCAN and dbscan?

Here's one link where both lines are used in the import: https://gemfury.com/stream/python:scikit-learn/-/content/cluster/tests/test_dbscan.py