How to Inspect a matrix to see if a display object is skewed?

Hi,

I’ve been working on an FXG Editor, and I’m using the the senocular transform tool to move, rotate, scale and
skew an object.

Is it possible to detect if the the Display object has been skewed just from inspecting the
matrix of that DisplayObject? even if said object has been move, scaled and rotated as well.

I want to only serialize the matrix of an object to FXG if has been skewed and not if it has just been rotated,
moved, or scaled.

Thanks