syntax_data: {"ast_node_type":"other","tokens":[{"end":42,"kind":"keyword","start":0,"text":"is_derived:"}]}
source_snippet:         is_derived: automatically_derived,
context_before:         has_impl: infcx.predicate_must_hold_modulo_regions(&partial_eq_obligation),
context_after:         structural_partial_eq: structural_peq,