code: def from_pb(cls, cluster_pb, instance):
          
          match_cluster_name = _CLUSTER_NAME_RE.match(cluster_pb.name)
          if match_cluster_name is None:
              raise ValueError(
                  "Cluster protobuf name was not in the " "expected format.",
                  cluster_pb.name,
              )
          if match_cluster_name.group("instance") != instance.instance_id:
              raise ValueError(
                  "Instance ID on cluster does not match the " "instance ID on the client"
              )
          if match_cluster_name.group("project") != instance._client.project:
              raise ValueError(
                  "Project ID on cluster does not match the " "project ID on the client"
              )
          cluster_id = match_cluster_name.group("cluster_id")
  
          result = cls(cluster_id, instance)
          result._update_from_pb(cluster_pb)
          return result
docs: Creates an cluster instance from a protobuf.
  
          For example:
  
          .. literalinclude:: snippets.py
              :start-after: [START bigtable_cluster_from_pb]
              :end-before: [END bigtable_cluster_from_pb]
  
          :type cluster_pb: :class:`instance_pb2.Cluster`
          :param cluster_pb: An instance protobuf object.
  
          :type instance: :class:`google.cloud.bigtable.instance.Instance`
          :param instance: The instance that owns the cluster.
  
          :rtype: :class:`Cluster`
          :returns: The Cluster parsed from the protobuf response.
          :raises: :class:`ValueError <exceptions.ValueError>` if the cluster
                   name does not match
                   ``projects/{project}/instances/{instance_id}/clusters/{cluster_id}``
                   or if the parsed instance ID does not match the istance ID
                   on the client.
                   or if the parsed project ID does not match the project ID
                   on the client.