syntax_data: {"ast_node_type":"other","tokens":[{"end":71,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // An element changed, prepare to intern the resulting list
context_before:         Some((i, new_t)) => {
context_after:             let mut new_list = SmallVec::<[_; 8]>::with_capacity(slice.len());