syntax_data: {"ast_node_type":"other","tokens":[{"end":54,"kind":"keyword","start":0,"text":"next:"}]}
source_snippet:     next: Option<(MovePathIndex, &'a MovePath<'tcx>)>,
context_before: struct MovePathLinearIter<'a, 'tcx, F> {
context_after:     fetch_next: F,