syntax_data: {"ast_node_type":"other","tokens":[{"end":36,"kind":"keyword","start":0,"text":"value:"}]}
source_snippet:         value: EarlyBinder<'tcx, T>,
context_before:         typing_env: ty::TypingEnv<'tcx>,
context_after:     ) -> Result<T, NormalizationError<'tcx>>