<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def validate(self):
 """Validate that the Literal is correctly representable."""

        # Literals representing boolean values or None are correctly representable and supported.
        if self.value is None or self.value is True or self.value is False:
            return

        # Literal safe strings are correctly representable and supported.
        if isinstance(self.value, six.string_types):
            validate_safe_string(self.value)
            return

        # Literal ints are correctly representable and supported.
        if isinstance(self.value, int):
            return

        # Literal empty lists, and non-empty lists of safe strings, are
        # correctly representable and supported.
        if isinstance(self.value, list):
            if len(self.value) > 0:
                for x in self.value:
                    validate_safe_string(x)
            return

        raise GraphQLCompilationError(u'Cannot represent literal: {}'.format(self.value))