syntax_data: {"ast_node_type":"variable","tokens":[{"end":67,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let start = self.0.partition_point(|(k, _)| **k < *prefix);
context_before:     ) -> Option<impl Iterator<Item = (String, &'s SearchPathFile)>> {
context_after:         if start == self.0.len() {