将字节数组的golang字符串格式转换回原始字节数组

So i started with a message as a string, turned it into a byte array and printed it, I've now lost the original string but have the string output of the byte array. I want my string back. (don't ask me why i did this or how... I didn't really, this is just for illustration purposes).

Essentially the bit I'm missing is a convenient way to turn the printed representation of a byte array back into a byte array.

See the example below to explain better what I'm trying to do (complete 'otherWay' func):

go playground

package main

import (
    "fmt"
)

func main() {
    // started with originalString and lost it
    originalString := "I'm a string I am!"

    // I have the output of 'oneWay()' in my clipboard, so could paste into code
    golangStringFormatOfByteArray := oneWay(originalString)
    fmt.Println("String as bytes:", golangStringFormatOfByteArray )

    // get original string back
    returnString := otherWay(golangStringFormatOfByteArray )
    fmt.Println("Original String:", returnString )

}

func oneWay(theString string) string {

    theStringAsBytes := []byte(theString)
    golangStringFormatOfByteArray := fmt.Sprintf("%v", theStringAsBytes)

    return golangStringFormatOfByteArray 
}

func otherWay(stringFormat string) string {

    // how do I get the original string back

    return "I want you back"
}