@expected_duration.setter<EOL><INDENT>def expected_duration(self, expected_duration):<DEDENT>
if expected_duration is None:<EOL><INDENT>raise ValueError("<STR_LIT>")<EOL><DEDENT>if len(expected_duration) < <NUM_LIT:1>:<EOL><INDENT>raise ValueError("<STR_LIT>")<EOL><DEDENT>self._expected_duration = expected_duration<EOL>
Sets the expected_duration of this ModelBreak.
Format: RFC-3339 P[n]Y[n]M[n]DT[n]H[n]M[n]S. The expected length of the break.

:param expected_duration: The expected_duration of this ModelBreak.
:type: str