syntax_data: {"ast_node_type":"other","tokens":[{"end":98,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                     // FIXME(@dianne): this needs updating/removing if we always merge or-patterns
context_before:                     // other words, we can assume this expands into subcandidates.
context_after:                     extra_data.bindings.push(super::SubpatternBindings::FromOrPattern);