def METHOD_NAME(self):
    """
    TESTS::
        sage: from sage.features.interfaces import InterfaceFeature
        sage: from sage.interfaces.sage0 import Sage
        sage: f = InterfaceFeature("sage0", "sage.interfaces.sage0")
        sage: f.is_present()
        FeatureTestResult('sage0', True)
    """
    result = self.module.is_present()
    if not result:
        return result
    m = importlib.import_module(self.module.name)
    try:
        interface = getattr(m, self.name)
    except Exception as exception:
        return FeatureTestResult(self, False,
                                 reason=f"Interface {self.name} cannot be imported: {exception}")
    try:
        interface('2+3')
        return FeatureTestResult(self, True)
    except Exception as exception:
        return FeatureTestResult(self, False,
                                 reason=f"Interface {interface} is not functional: {exception}")