code: func JsonKeys(b []byte) ([]string, error) {
  	var keyMap map[string]interface{}
  
  	err := json.Unmarshal(b, &keyMap)
  	if err != nil {
  		return []string{}, err
  	}
  
  	keys := make([]string, len(keyMap))
  	ndx := 0
  	for k := range keyMap {
  		keys[ndx] = k
  		ndx++
  	}
  	return keys, nil
  }
docs: // JsonKeys takes an arbitrary byte array representing a json stringified object
  // and returns all the keys of that object.