MainTimeline Frame Functions -> Class Methods

Flash CS3 裡 MainTimeline frame actions 定義的 functions (not literal)
如何轉換成 class methods 的定義呢 ?
測試了一下, 無論在哪一格定義, 全都變成 public class methods

Frame 1:

b();
a();
function a():void {
 trace('a');
}

Frame 6:

stop();
function b():void {
 trace('b');
}
trace(describeType(this));

輸出結果:

b
a
<type name="Untitled_fla::MainTimeline" base="flash.display::MovieClip" isDynamic="true" isFinal="false" isStatic="false">
...
  <method name="a" declaredBy="Untitled_fla::MainTimeline" returnType="void"/>
  <method name="b" declaredBy="Untitled_fla::MainTimeline" returnType="void"/>
...