syntax_data: {"ast_node_type":"other","tokens":[{"end":52,"kind":"keyword","start":0,"text":"this.lower_let_expr("}]}
source_snippet:                                 this.lower_let_expr(
context_before:                             this.in_if_then_scope(last_remainder_scope, else_block_span, |this| {
context_after:                                     block,