def __init__(self, wf_spec, name, lane=None, **kwargs):
super(BpmnSpecMixin, self).__init__(wf_spec, name, **kwargs)<EOL>self.outgoing_sequence_flows = {}<EOL>self.outgoing_sequence_flows_by_id = {}<EOL>self.lane = lane<EOL>self.documentation = None<EOL>
Constructor.

:param lane: Indicates the name of the lane that this task belongs to
(optional).