B4J Question [BANano] [SOLVED] How does one use the .RequestAnimationFrame?

[WARNING]: The method RequestAnimationFrame in requestanimationframe can not find '_methodname'!

Sub animate(timeStamp As Double)
    Dim cat As BANanoElement
    Dim hat As BANanoElement
    cat.Initialize("#cat")
    hat.Initialize("#hat")
    '
    If (lastTime <> Null) Then
        angle = angle + (timeStamp - lastTime) * 0.001
    End If
  
    lastTime = timeStamp
    Dim sctop As String = (Sin(angle) * 40 + 40) & "px"
    Dim scleft As String = (Cos(angle) * 200 + 230) & "px"
    Dim shtop As String = (Sin(angle + cPI) * 40 + 40) & "px"
    Dim shleft As String = (Cos(angle + cPI) * 200 + 230) & "px"
    '
    Dim cstyle As Map = CreateMap("top":sctop, "left":scleft)
    cat.SetStyle(BANano.ToJson(cstyle))
    '
    Dim hstyle As Map = CreateMap("top":shtop, "left":shleft)
    hat.SetStyle(BANano.ToJson(hstyle))
  
    BANano.Window.RequestAnimationFrame(Me, "animate")
End Sub

angle = 0
    lastTime = Null
  
    BANano.Window.RequestAnimationFrame(Me, "animate")