pub type FixedBreadth<'a> = CalcableValue<'a, NonNegative<LengthPercentage>>;Expand description
https://drafts.csswg.org/css-grid-2/#typedef-fixed-breadth
<fixed-breadth> = <length-percentage [0,∞]>Aliased Type§
#[repr(C, u8)]pub enum FixedBreadth<'a> {
Literal(NonNegative<LengthPercentage>),
Substituted(Box<'a, CalcableSubstitutionFunction<'a, NonNegative<LengthPercentage>>>),
Unresolved(Box<'a, Unresolved<'a>>),
}