syntax_data: {"ast_node_type":"variable","tokens":[{"end":46,"kind":"keyword","start":0,"text":"while"}]}
source_snippet:     while let Some(child_index) = next_child {
context_before:     let mut next_child = move_data.move_paths[path].first_child;
context_after:         let move_path_children = &move_data.move_paths[child_index];