syntax_data: {"ast_node_type":"variable","tokens":[{"end":36,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                     let let_source =
context_before:                 self.with_lint_level(lint_level, |this| {
context_after:                         if else_block.is_some() { LetSource::LetElse } else { LetSource::PlainLet };