Constant ZSH_WRAPPER 

pub(crate) const ZSH_WRAPPER: &str = r#"gbm() {
  if (( $# == 0 )); then
    local branch
    branch="$(command gbm --pick)" || return
    [[ -n "$branch" ]] || return
    print -z -- "gbm ${(q)branch}"
    return
  fi

  command gbm "$@"
}
"#;