let x_padding = hash["padding"] ?? 50;

let header = #{
  x_padding: x_padding,
  out: "",
  append: |suffix| {
    this.out += suffix + "\n";
  },
  append_center: |suffix| {

    let suffix_len = suffix.len();
    let padding = this.x_padding - suffix_len / 2;
    let fill = "";
    fill.pad(padding, " ");

    this.out += fill + suffix.to_upper() + fill + "\n";
  },
  append_divider: || {
    let divider = "";
    divider.pad(this.x_padding * 2, "─");

    this.append(divider);
  },
  open_echo: || {
    this.out += "echo -e '\n";
  },
  close_echo: || {
    this.out += "'";
  },
  to_string: || {
    return this.out;
  }
};

header.open_echo();

header.append_divider();


params.for_each(|idx| {
  header.append_center(this);
});

header.append_divider();
header.close_echo();

return header.to_string();