def has_any_role?(*roles,&block)
      user_roles = authorization_engine.roles_for(current_user)
      result = roles.any? do |role|
        user_roles.include?(role)
      end
      yield if result and block_given?
      result
    end
def has_any_role?(*roles,&block)
      user_roles = authorization_engine.roles_for(current_user)
      result = roles.any? do |role|
        user_roles.include?(role)
      end
      yield if result and block_given?
      result
    end
Intended to be used where you want to allow users with any single listed role to view
 the content in question