How would you implement a custom Stringer interface for a struct in Go?

Define a String() method for the struct.
Implement a ToString() method for the struct.
Use the fmt.Sprintf() function with the struct.
Create a separate utility function for string conversion.

To implement a custom Stringer interface for a struct in Go, you need to define a String() method for the struct. This method should return a string representation of the struct's data. When you implement the String() method, Go's fmt package will automatically use it when you format the struct with fmt.Printf() or fmt.Println(). This allows you to customize the string representation of your struct.

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