let column = |
#spacing: &f64 = &0.0,
#padding: &Padding = &`All(0.0),
#width: &Length = &`Shrink,
#height: &Length = &`Shrink,
#halign: &HAlign = &`Left,
children: &Array<Widget>
| -> Widget `Column({ children, spacing, padding, width, height, halign })