How to select all the first level childs in Nx Assembly.

Hello Friends

Nx Version : Nx 9 / Nx 11 both Teamcenter Integerated.

Nx Module : Assembly

I need to select all the first level parts in the assembly navigator. This is for design a macro which needs to be performed for certain options.

Is there is any way to select the first level childs in Assembly Navigator.

Regards

thilag