How to get a concurrent method?

In my case, the library would be called from a program to get a value to each argument str --in method Get()--.

When it's used Get() then it assigns a variable from type bytes.Buffer which it will have the value to return.

The returned values --when it been concurrently called-- will be stored into a database or a file and it doesn't matter that its output been of FIFO way (from method).

type test struct {
    foo uint8
    bar uint8
}

func NewTest(arg1 string) (*test, os.Error) {...}

func (self *test) Get(str string) ([]byte, os.Error) {
    var format bytes.Buffer
    ...
}

I think that all code inner of method Get() should be put inner of go func() {...}(), and then to use a channel.

Would there be a problem if it's called another method from Get()? Or would it also has to be concurrent?