syntax_data: {"ast_node_type":"other","tokens":[{"end":97,"kind":"keyword","start":0,"text":"this.build_drop_and_replace(block,"}]}
source_snippet:                         this.build_drop_and_replace(block, lhs_expr.span, lhs, rhs).into_block();
context_before:                     block =
context_after:                 } else {