The specific meanings of the various key values represented in the model output `pose_output`

[zhong2001]

Hello, this is a really great piece of work!
I want to know the specific meanings of the various key values represented in the model output pose_output. I plan to convert it into the following form and hope to get your help.

smplx_params = {
        'root_pose':,
        'body_pose': ,
        'lhand_pose': ,
        'rhand_pose':,
        'jaw_pose': ,
        'shape': ,
        'expr': ,
        'trans': ,
    }