syntax_data: {"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":"\"structurally_relate_consts::<{}>(a"}]}
source_snippet:         "structurally_relate_consts::<{}>(a = {:?}, b = {:?})",
context_before:     trace!(
context_after:         std::any::type_name::<R>(),