syntax_data: {"ast_node_type":"variable","tokens":[{"end":41,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let span = self.next_point(span);
context_before:         let span = self.span_extend_while_whitespace(mac_call);
context_after:         if self.span_to_snippet(span).as_deref() == Ok(";") { Some(span) } else { None }