{"ast_node_type":"variable","tokens":[{"end":18,"kind":"keyword","start":0,"text":"let"}]}
    let mut item =
fn snippet(ctx: &CompletionContext<'_>, cap: SnippetCap, label: &str, snippet: &str) -> Builder {
        CompletionItem::new(CompletionItemKind::Snippet, ctx.source_range(), label, ctx.edition);