syntax_data: {"ast_node_type":"other","tokens":[{"end":98,"kind":"keyword","start":0,"text":"else_blk"}]}
source_snippet:                     else_blk = this.expr_into_dest(destination, else_blk, else_expr).into_block();
context_before:                 if let Some(else_expr) = else_opt {
context_after:                 } else {