let markdown = |
#on_link: fn(url: string) -> Any = |_| null,
#spacing: &[f64, null] = &null,
#text_size: &[f64, null] = &null,
#width: &Length = &`Fill,
content: &string
| -> Widget `Markdown({ content, on_link: &on_link, spacing, text_size, width })