anchor.diff:                  else
                       exprAsStatement ctx expr)
   
  -        let name = Helpers.getUniqueIdentifier "expr"
  +        let name = Helpers.getUniqueIdentifier "_expr"
   
           let func =
               Statement.functionDef (name = name, args = Arguments.arguments [], body = body)
  
positive.code:                     stmts @ exprAsStatement ctx expr)
              |> transformBody com ctx None
  
          let name = Helpers.getUniqueIdentifier "expr"
  
          let func =
              Statement.functionDef (name = name, args = Arguments.arguments [], body = body)
  
negative.code:         let name =
              name
              |> Option.map (fun name -> com.GetIdentifier(ctx, name))
              |> Option.defaultValue (Helpers.getUniqueIdentifier "_expr")
  
          let func = makeFunction name (args, body, decoratorList, returnType)
  
  