@abstractmethod<EOL><INDENT>def is_run_as(self):<DEDENT>
pass<EOL>
Returns True if this Subject is 'running as' another identity other than
its original one or False otherwise (normal Subject state).  See the
run_as method for more information.

:returns: True if this Subject is 'running as' another identity other
          than its original one or False otherwise (normal Subject state)
:rtype: bool