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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def generate (self, ps):
 """ Generates all possible targets contained in this project. """

        assert isinstance(ps, property_set.PropertySet)
        self.manager_.targets().log(
            "Building project '%s' with '%s'" % (self.name (), str(ps)))
        self.manager_.targets().increase_indent ()

        result = GenerateResult ()

        for t in self.targets_to_build ():
            g = t.generate (ps)
            result.extend (g)

        self.manager_.targets().decrease_indent ()
        return result