syntax_data: {"ast_node_type":"other","tokens":[{"end":72,"kind":"keyword","start":0,"text":"Self::from_union((ty,"}]}
source_snippet:                             Self::from_union((ty, layout), *adt_def, cx)
context_before:                         (AdtKind::Union, Unbounded, Unbounded) => {
context_after:                         }