'Describes your import snapshot tasks. More information can be found
at https://goo.gl/CI0MdS.
:param import_task_id: Import task Id for the current
Import Snapshot Task
:type import_task_id: ``str``
:param  dry_run: Checks whether you have the permission for
the action, without actually making the request,
and provides an error response.(optional)
:type   dry_run: ``bool``
:rtype: :class:``DescribeImportSnapshotTasks Object``'

def ex_describe_import_snapshot_tasks(self, import_task_id, dry_run=None):

    params = {'Action': 'DescribeImportSnapshotTasks'}
    if (dry_run is not None):
        params['DryRun'] = dry_run
    params['ImportTaskId.1'] = import_task_id
    res = self._to_import_snapshot_task(self.connection.request(self.path, params=params).object)
    return res
