Checks if value is included within self.given_list.
        Keyword arguments:
        value str -- the value of the associated field to compare

def run(self, value):
        """ Checks if value is included within self.given_list.
        Keyword arguments:
        value str -- the value of the associated field to compare
        """
        if self.pass_ and not value.strip():
            return True

        if (value.strip() if self.strip else value) not in self.given_list:
            self.error = self.error.format(value)
            return False
        return True