syntax_data: {"ast_node_type":"variable","tokens":[{"end":76,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:                 if let Ok(candidate_set) = self.assemble_candidates(stack) {
context_before:                 // Heuristics: show the diagnostics when there are no candidates in crate.
context_after:                     let mut no_candidates_apply = true;