anchor.diff:  }
   
   let updateEmployee (employee: Employee2) =
  +    let foundEmployee = query {
  +        for p in ctx.Public.Employee2 do
  +        where (p.Id = employee.Id)
  +        exactlyOneOrDefault
  +    }
  +    if not (isNull foundEmployee) then
  +        foundEmployee.FirstName <- employee.FirstName
  +        foundEmployee.LastName <- employee.LastName
  +    ctx.SubmitUpdates()
  +
  +let updateEmployee' (employee: Employee2) =
       query {
           for p in ctx.Public.Employee2 do
           where (p.Id = employee.Id)
  
positive.code: 
  ctx.SubmitUpdates()
  
  (** update a single row 
  *)
  
  type Employee2 = {
  
negative.code:         e.LastName <- employee.LastName
      )
      ctx.SubmitUpdates()
  
  let john = {
    Id = 1
    FirstName = "John"
    LastName = "Doe" }
  
  updateEmployee john
  updateEmployee' john
  
  
  (**Finally it is also possible to specify a seq of `string * obj` which is exactly the 
  