syntax_data: {"ast_node_type":"other","tokens":[{"end":60,"kind":"keyword","start":0,"text":"Answer::No(Reason::DstIsTooBig),"}]}
source_snippet:                             Answer::No(Reason::DstIsTooBig),
context_before:                             is_transmutable(&small, &large, assume),
context_after:                             "assume: {assume:?}"