menus.py

import bpy
from bpy.types import (
    Context,
    Menu,
    UILayout
)


class BONEWIDGET_MT_bw_specials(Menu):
    bl_label = "Bone Widget Specials"

    def draw(self, context: 'Context'):
        layout: 'UILayout' = self.layout
        layout.operator("bonewidget.add_widgets", icon="ADD",
                        text="Add Widget to library")
        layout.operator("bonewidget.remove_widgets", icon="REMOVE",
                        text="Remove Widget from library")


classes = (
    BONEWIDGET_MT_bw_specials,
)


def register():
    from bpy.utils import register_class
    for cls in classes:
        register_class(cls)


def unregister():
    from bpy.utils import unregister_class
    for cls in classes:
        unregister_class(cls)