function isLooped(node, parent) {
	switch (parent.type) {
		case "ForStatement":
			return (
				node === parent.test ||
				node === parent.update ||
				node === parent.body
			);

		case "ForOfStatement":
		case "ForInStatement":
			return node === parent.body;

		case "WhileStatement":
		case "DoWhileStatement":
			return node === parent.test || node === parent.body;

		default:
			return false;
	}
}
Check whether the given node is in loop.
@param {ASTNode} node A node to check.
@param {ASTNode} parent A parent node to check.
@returns {boolean} `true` if the node is in loop.