def METHOD_NAME(self):
    r"""
    Test for the presence of the join feature.
    EXAMPLES::
        sage: from sage.features.latte import Latte
        sage: Latte()._is_present()  # optional - latte_int
        FeatureTestResult('latte_int', True)
    """
    for f in self._features:
        test = f.METHOD_NAME()
        if not test:
            return test
    return FeatureTestResult(self, True)