Return the lease info for all partitions.
        A typical implementation could just call get_lease_async() on all partitions.

        :return: A list of lease info.
        :rtype: list[~azure.eventprocessorhost.lease.Lease]

async def get_all_leases(self):
        """
        Return the lease info for all partitions.
        A typical implementation could just call get_lease_async() on all partitions.

        :return: A list of lease info.
        :rtype: list[~azure.eventprocessorhost.lease.Lease]
        """
        lease_futures = []
        partition_ids = await self.host.partition_manager.get_partition_ids_async()
        for partition_id in partition_ids:
            lease_futures.append(self.get_lease_async(partition_id))
        return lease_futures