syntax_data: {"ast_node_type":"variable","tokens":[{"end":74,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let stmts = self.mirror_stmts(block.hir_id.local_id, block.stmts);
context_before:         // in order to get the lexical scoping correctly.
context_after:         let block = Block {