fzf wrap for GoImplements

[kerma]

What did you do?

I'm trying to quickly navigate in a larger project which has a lot of interfaces and many implementations to them. Usual workflow goes as:

• Use CTRL-] until I end up on an interface definition
• Trigger :GoImplements
• Navigate to locationlist, usually CTRL+w j
• Navigate to implementation line and open file in new buffer, something like 2j<CR>

What did you expect to happen?

GoImplements opens up a fzf popup window, like GoDecls

What happened instead?

GoImplements can only open location or quickfix window

EDIT: Bonus would be to use GoDef stack as well for this navigation pattern

[zouchao]

Hope :GoCallers will support it too