I just read this https://blender.stackexchange.com/a/80833/81534
In this answer i was focused at this line -
if you have bl_idname='mesh.beautify' then the operator can be called from python with bpy.ops.mesh.beautify() and is added to a panel with layout.operator('mesh.beautify')
what operation should i add here (bpy.ops.?.?) to add a node group to the active material. I have Already created a node group using python script but don't know what to place in front of bl_idname
bl_idname = '?????'
Can anyone help me ??