'Extend the mail\'s static mention suggestions by adding the employees.'

@api.model
def get_static_mention_suggestions(self):

    suggestions = super(Partner, self).get_static_mention_suggestions()
    try:
        employee_group = self.env.ref('base.group_user')
        hr_suggestions = [{'id': user.partner_id.id, 'name': user.name, 'email': user.email} for user in employee_group.users]
        suggestions.append(hr_suggestions)
        return suggestions
    except AccessError:
        return suggestions
