syntax_data: {"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"for"}]}
source_snippet:         for basic_block in body.basic_blocks.as_mut() {
context_before:     fn run_pass(&self, _tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
context_after:             for statement in basic_block.statements.iter_mut() {