anchor.diff:  let inline length (resizeArray : ResizeArray<'T>) =
       resizeArray.Count
   
  -//
  +/// Return true if the given array is empty, otherwise false.
   [<CompiledName("IsEmpty")>]
   let inline isEmpty (resizeArray : ResizeArray<'T>) =
       resizeArray.Count = 0
  
positive.code:         result.Add <| mapping.Invoke (i, resizeArray.[i])
      result
  
  //
  [<CompiledName("Map2")>]
  let map2 mapping (resizeArray1 : ResizeArray<'T1>) (resizeArray2 : ResizeArray<'T2>)
      : ResizeArray<'U> =
  
negative.code:     | index ->
          index
  
  /// Return the index of the first element in the array
  /// that satisfies the given predicate.
  [<CompiledName("TryFindIndexIndexed")>]
  let tryFindIndexi predicate (resizeArray : ResizeArray<'T>) : int option =
      // Preconditions
  