Material_Tools_Debug_Materials_Make_Shader_Groups - Diffeomorphic/import_daz GitHub Wiki
Make Shader Groups
The DAZ Importer creates node groups which mimic the behaviour of Iray. These node groups can be used in other materials, provided that they are in Blender's database, i.e. some material that uses the groups have already been loaded. However, if you want to a specific node group that has not been loaded, this tool can be used to create it.

Press Make Shader Groups and select the desired shader groups in the dialog.

The specified node groups are now created in the active material.