recommended pattern for binding my own function to zle-line-pre-redraw while supporting z-sy-h

[olets]

I want to bind a function of my own to zle-line-pre-redraw.

Doing this naively effectively disables z-sy-h

# load z-sy-h

my_fn() {
  # my functionality
}

zle -N zle-line-pre-redraw my_fn

I've found that, as you know, calling _zsh_highlight__zle-line-pre-redraw from my function lets me add my functionality alongside z-sy-h

# load z-sy-h

my_fn() {
  (( ${+functions[_zsh_highlight__zle-line-pre-redraw]} )) && _zsh_highlight__zle-line-pre-redraw
  # my functionality
}

zle -N zle-line-pre-redraw my_fn

Is that what you recommend?