@abc.abstractmethod<EOL><INDENT>def is_section(self):<DEDENT>
return<EOL>
Tests if this part should be visible as a section in an assessment.

        If visible, this part will appear to the user as a separate
        section of the assessment. Typically, a section may not be under
        a non-sectioned part.

        :return: ``true`` if this part is a section, ``false`` otherwise
        :rtype: ``boolean``


        *compliance: mandatory -- This method must be implemented.*