syntax_data: {"ast_node_type":"other","tokens":[{"end":32,"kind":"keyword","start":0,"text":"for"}]}
source_snippet:     for i in 0..show_cycle_len {
context_before:     let mut suggestion = Vec::with_capacity(show_cycle_len * 2);
context_after:         let (_, field_id) = item_and_field_ids[i];