Quick create empty function or method

[sergeylanzman]

Create empty missing Method for struct in struct file.
example:

a.go file 
type A struct{
   d string
}
func(a A) FirstMethod()bool{
    return bool
}


otherfile.go file 
func Otherfunction(){
    a:= A{}
    A.SecondMethod() //---> color red now, add option create Method from here in a.go file
}

If available pass name and type of params this cool 👍

Same scenario for empty create function but in otherfile.go

[zolotov]

Quite smart create function quick fix is implemented via #2566 and will be available in today's nightly