syntax_data: {"ast_node_type":"function","tokens":[{"end":56,"kind":"keyword","start":0,"text":"pub"}]}
source_snippet:     pub fn trim_end(self, other: Span) -> Option<Span> {
context_before:     /// Returns `Some(span)`, where the end is trimmed by the start of `other`.
context_after:         let span = self.data();