You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: oneinstance_fact.go
    path of file: ./repos/mgmt/lang/core/test
    
    the code of the file until where you have to start completion: // Mgmt
// Copyright (C) 2013-2024+ James Shubin and the project contributors
// Written by James Shubin <james@shubin.ca> and 
    
func (obj *OneInstanceFact) Init(init *facts.Init) error {
	obj.init = init
	obj.init.Logf("Init of `%s` @ %p", obj.Name, obj)

	obj.Mutex.Lock()
	if *obj.Flag {
		panic("should not get called twice")
	}
	b := true
	obj.Flag = &b
	obj.Mutex.Unlock()
	return nil
}