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css_ast/types/
mask_reference.rs

1/// <https://drafts.csswg.org/css-masking-1/#typedef-mask-reference>
2///
3/// ```text,ignore
4/// <mask-reference> = none | <image> | <mask-source>
5/// <mask-source> = <url>
6/// ```
7///
8/// Since `<image>` already includes `<url>`, this simplifies to `none | <image>`.
9pub type MaskReference<'a> = crate::NoneOr<crate::Image<'a>>;