@disnake.ui.button(label='Grey', style=disnake.ButtonStyle.grey, custom_id='persistent_view:grey')
async def grey(self, button: disnake.ui.Button, interaction: disnake.MessageInteraction):
    (await interaction.response.send_message('This is grey.', ephemeral=True))
@disnake.ui.button(label='Grey', style=disnake.ButtonStyle.grey, custom_id='persistent_view:grey')
async def grey(self, button: disnake.ui.Button, interaction: disnake.MessageInteraction):
    (await interaction.response.send_message('This is grey.', ephemeral=True))