def __call__(self, sid):
return StepContext(<EOL>self._version,<EOL>flow_sid=self._solution['<STR_LIT>'],<EOL>engagement_sid=self._solution['<STR_LIT>'],<EOL>sid=sid,<EOL>)<EOL>
Constructs a StepContext

:param sid: Step Sid.

:returns: twilio.rest.studio.v1.flow.engagement.step.StepContext
:rtype: twilio.rest.studio.v1.flow.engagement.step.StepContext