anchor.diff:      let mutable _arrowhead: int option = None
       let mutable _arrowsize: float option = None
       let mutable _arrowwidth: float option = None
  +    let mutable _axref: _ option = None
       let mutable _ax: float option = None
  +    let mutable _ayref: _ option = None
       let mutable _ay: float option = None
       let mutable _xref: _ option = None
       let mutable _x: _ option = None
  
positive.code:     member __.ShouldSerializearrowhead() = not _arrowhead.IsNone
      member __.ShouldSerializearrowsize() = not _arrowsize.IsNone
      member __.ShouldSerializearrowwidth() = not _arrowwidth.IsNone
      member __.ShouldSerializeax() = not _ax.IsNone
      member __.ShouldSerializeay() = not _ay.IsNone
      member __.ShouldSerializexref() = not _xref.IsNone
      member __.ShouldSerializex() = not _x.IsNone
  
negative.code:         with get () = Option.get _arrowwidth
          and set value = _arrowwidth <- Some value
  
      /// Sets the annotation's ax coordinate axis. If set to an x axis id (e.g. *x* or *x2*), the `ax` position refers to an x coordinate If set to *paper*, the `ax` position refers to the distance from the left side of the plotting area in normalized coordinates where 0 (1) corresponds to the left (right) side.
      member __.axref
          with get () = Option.get _axref
          and set value = _axref <- Some value
  
      /// Sets the x component of the arrow tail about the arrow head. A positive (negative) component corresponds to an arrow pointing from right to left (left to right)
      member __.ax
          with get () = Option.get _ax
          and set value = _ax <- Some value
  
      /// Sets the annotation's ay coordinate axis. If set to an y axis id (e.g. *y* or *y2*), the `ay` position refers to an y coordinate If set to *paper*, the `ay` position refers to the distance from the bottom of the plotting area in normalized coordinates where 0 (1) corresponds to the bottom (top).
      member __.ayref
          with get () = Option.get _ayref
          and set value = _ayref <- Some value
  
      /// Sets the y component of the arrow tail about the arrow head. A positive (negative) component corresponds to an arrow pointing from bottom to top (top to bottom)
      member __.ay
  