Example descriptor options

options.proto

syntax = "proto3";

package fs.auth;

import "fs/shared/flags/flags.proto";
import "google/protobuf/descriptor.proto";

extend google.protobuf.MethodOptions {
 repeated fs.flags.Flag required_flags = 20000;

 // force people to explicitly declare if they really want
 // to allow callers with no permissions, to guard against
 // people just forgetting to set required flags
 bool allow_no_flags = 20001;
}