Create this cluster.

        For example:

        .. literalinclude:: snippets.py
            :start-after: [START bigtable_create_cluster]
            :end-before: [END bigtable_create_cluster]

        .. note::

            Uses the ``project``, ``instance`` and ``cluster_id`` on the
            current :class:`Cluster` in addition to the ``serve_nodes``.
            To change them before creating, reset the values via

            .. code:: python

                cluster.serve_nodes = 8
                cluster.cluster_id = 'i-changed-my-mind'

            before calling :meth:`create`.

        :rtype: :class:`~google.api_core.operation.Operation`
        :returns: The long-running operation corresponding to the
                  create operation.

def create(self):
        """Create this cluster.

        For example:

        .. literalinclude:: snippets.py
            :start-after: [START bigtable_create_cluster]
            :end-before: [END bigtable_create_cluster]

        .. note::

            Uses the ``project``, ``instance`` and ``cluster_id`` on the
            current :class:`Cluster` in addition to the ``serve_nodes``.
            To change them before creating, reset the values via

            .. code:: python

                cluster.serve_nodes = 8
                cluster.cluster_id = 'i-changed-my-mind'

            before calling :meth:`create`.

        :rtype: :class:`~google.api_core.operation.Operation`
        :returns: The long-running operation corresponding to the
                  create operation.
        """
        client = self._instance._client
        cluster_pb = self._to_pb()

        return client.instance_admin_client.create_cluster(
            self._instance.name, self.cluster_id, cluster_pb
        )