function isEmptyString(node) {
	return (
		astUtils.isStringLiteral(node) &&
		(node.value === "" ||
			(node.type === "TemplateLiteral" &&
				node.quasis.length === 1 &&
				node.quasis[0].value.cooked === ""))
	);
}
Checks whether a node is an empty string literal or not.
@param {ASTNode} node The node to check.
@returns {boolean} Whether or not the passed in node is an
empty string literal or not.