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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 validate(self):
 """ Applies all defined validation to the current state of the object, and raises an error if they are not all met. Raises: ValidationError: if validations do not pass """


        missing = self.missing_property_names()

        if len(missing) > 0:
            raise validators.ValidationError(
                "'{0}' are required attributes for {1}"
                            .format(missing, self.__class__.__name__))

        for prop, val in six.iteritems(self._properties):
            if val is None:
                continue

            if isinstance(val, ProtocolBase):
                val.validate()
            elif getattr(val, 'isLiteralClass', None) is True:
                val.validate()
            elif isinstance(val, list):
                for subval in val:
                  subval.validate()
            else:
                # This object is of the wrong type, but just try setting it
                # The property setter will enforce its correctness
                # and handily coerce its type at the same time
                setattr(self, prop, val)

        return True