A very simple GetAffiliatedKeywords trait.

src/types/affiliated_keyword.rs

@@ -19,3 +19,7 @@ pub struct AffiliatedKeyword<'s> {
 pub struct AffiliatedKeywords<'s> {
     pub(crate) keywords: BTreeMap<&'s str, AffiliatedKeywordValue<'s>>,
 }
+
+pub trait GetAffiliatedKeywords<'s> {
+    fn get_affiliated_keywords<'a>(&'a self) -> &'a AffiliatedKeywords<'s>;
+}

src/types/greater_element.rs

@@ -1,3 +1,4 @@
+use super::affiliated_keyword::GetAffiliatedKeywords;
 use super::element::Element;
 use super::lesser_element::TableCell;
 use super::AffiliatedKeywords;
@@ -220,3 +221,9 @@ impl<'s> TableRow<'s> {
         }
     }
 }
+
+impl<'s> GetAffiliatedKeywords<'s> for PlainList<'s> {
+    fn get_affiliated_keywords<'a>(&'a self) -> &'a AffiliatedKeywords<'s> {
+        &self.affiliated_keywords
+    }
+}

src/types/mod.rs

@@ -13,6 +13,7 @@ mod util;
 pub use affiliated_keyword::AffiliatedKeyword;
 pub use affiliated_keyword::AffiliatedKeywordValue;
 pub use affiliated_keyword::AffiliatedKeywords;
+pub use affiliated_keyword::GetAffiliatedKeywords;
 pub(crate) use ast_node::AstNode;
 pub use document::Document;
 pub use document::DocumentElement;