syntax_data: {"ast_node_type":"other","tokens":[{"end":34,"kind":"keyword","start":0,"text":"Self::ThereExists"}]}
source_snippet:             Self::ThereExists => {
context_before:         let (init, try_fold_f): (_, fn(_, _) -> _) = match self {
context_after:                 (Answer::No(Reason::DstIsBitIncompatible), |accum: Answer<R, T>, next| match accum