GoLang: Interface As Parameter

main.go

package main

import (
	"fmt"
)

type Processor interface {
    Process()
}

type Registry struct {
	name string
}

// Type Registry implements Processor interface
func (r Registry) Process() {
	fmt.Println("I print so I am")
} 

// Another function takes the interface as an argument
func anotherFunction(p Processor) {	
	fmt.Println("I pretend to do extra stuff")
    	p.Process()
}


func main() {
	var a Registry
	a.name = "Alice"
	anotherFunction(a)
 	describe(a)
}

func describe(i Processor) {
	fmt.Printf("(%v, %T)\n", i, i)
}