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style: Add a Document::elements_with_id API.
MozReview-Commit-ID: BNtbJp0RI68 Signed-off-by: Emilio Cobos Álvarez <emilio@crisal.io>
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@ -146,6 +146,17 @@ pub trait TDocument : Sized + Copy + Clone {
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/// Returns the quirks mode of this document.
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fn quirks_mode(&self) -> QuirksMode;
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/// Get a list of elements with a given ID in this document.
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///
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/// Can return an error to signal that this list is not available, or also
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/// return an empty slice.
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fn elements_with_id(
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&self,
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_id: &Atom,
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) -> Result<&[<Self::ConcreteNode as TNode>::ConcreteElement], ()> {
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Err(())
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}
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}
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/// The `TNode` trait. This is the main generic trait over which the style
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