The message you provided is not code but a warning...

The message you provided is not code but a warning message outputted by Node.js during the runtime of a program. It describes that the util._extend method is deprecated and recommends using Object.assign() instead.

Here's what the warning means:

• util._extend was a method in Node.js's util module. It was used to shallow-copy the properties from one object to another.
• However, this method is considered deprecated because there are now better alternatives, such as JavaScript's built-in Object.assign() method or the spread operator ({ ...obj }).
• The warning indicates that util._extend should no longer be used in the code, and developers should migrate to using Object.assign() to achieve the same functionality.

For example:

Before (deprecated):

const util = require('util');
const obj1 = { a: 1 };
const obj2 = { b: 2 };

const result = util._extend(obj1, obj2);
console.log(result); // { a: 1, b: 2 }

After (recommended):

const obj1 = { a: 1 };
const obj2 = { b: 2 };

const result = Object.assign(obj1, obj2);
console.log(result); // { a: 1, b: 2 }

To summarize, the warning informs you that the project uses a deprecated API, and you should replace any instances of util._extend with Object.assign() for improved code compatibility and best practices.