Selgitage tühja liidese kontseptsiooni ja millal seda kasutatakse.

In Go, the empty interface (interface{}) is an interface that contains no methods. It can represent the value of any type because all types implement the empty interface by default.

This allows interface{} to be used as a universal container for storing values of different types.

Example of usage:

func printValue(v interface{}) {
    fmt.Println(v)
}

printValue(42)       // int
printValue("hello") // string
printValue(3.14)    // float64

The empty interface is often used when working with data of unknown type, for example, when working with JSON, or for creating universal functions and structures.