FB removes easing package import from code

This is a wierd error. FB is Flash Builder:

Sometimes when I add new code FB is trying to import assets/packages. For example: when I use flexGlobals somewhere inside code FB adds "import mx.core.FlexGlobals;" on the beginning of <![CDATA[

I use easing function inside MXML. So I manually add "import mx.effects.easing.*;" next to other import statements.

The error is whenever FB automaticly adds any "import" statement my "import mx.effects.easing.*;"  statement disappear and I have to write it again and again.

Is there some way to avoid this?