function isIIFEStatement(node) {
	if (node.type === "ExpressionStatement") {
		let call = astUtils.skipChainExpression(node.expression);

		if (call.type === "UnaryExpression") {
			call = astUtils.skipChainExpression(call.argument);
		}
		return (
			call.type === "CallExpression" && astUtils.isFunction(call.callee)
		);
	}
	return false;
}
Checks the given node is an expression statement of IIFE.
@param {ASTNode} node The node to check.
@returns {boolean} `true` if the node is an expression statement of IIFE.
@private