function isValidRadix(radix) {
	return !(
		(radix.type === "Literal" && !validRadixValues.has(radix.value)) ||
		(radix.type === "Identifier" && radix.name === "undefined")
	);
}
Checks whether a given node is a valid value of radix or not.

The following values are invalid.

- A literal except integers between 2 and 36.
- undefined.
@param {ASTNode} radix A node of radix to check.
@returns {boolean} `true` if the node is valid.