def mtime(self):
        return self.last_checked
Regression test for https://aeon.stsci.edu/ssb/trac/pyfits/ticket/153
dataset/ETHPy150Open babble/babble/include/jython/Lib/robotparser.py/RobotFileParser.mtime--crossover with--dataset/ETHPy150Open spacetelescope/PyFITS/pyfits/tests/test_table.py/TestTableFunctions.test_constructor_copies_header