syntax_data: {"ast_node_type":"function","tokens":[{"end":58,"kind":"keyword","start":0,"text":"pub"}]}
source_snippet:     pub fn trim_start(self, other: Span) -> Option<Span> {
context_before:     /// Returns `Some(span)`, where the start is trimmed by the end of `other`.
context_after:         let span = self.data();