syntax_data: {"ast_node_type":"other","tokens":[{"end":83,"kind":"keyword","start":0,"text":"write!(f,"}]}
source_snippet:                 write!(f, "({kind:?}: ({:?}: {:?}), {:?})", value, value_ty, to_ty)
context_before:                 let (value_ty, value, to_ty) = self.cast_args();
context_after:             }