syntax_data: {"ast_node_type":"other","tokens":[{"end":15,"kind":"keyword","start":0,"text":"|"}]}
source_snippet:             | (
context_before:             (&LocalsForNode::One(local_id), ForGuard::OutsideGuard)
context_after:                 &LocalsForNode::ForGuard { ref_for_guard: local_id, .. },