single property
Implementation
static final single = $pb.Extension<TestRequired>(const $core.bool.fromEnvironment('protobuf.omit_message_names') ? '' : 'protobuf_unittest.TestAllExtensions', const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'single', 1000, $pb.PbFieldType.OM, defaultOrMaker: TestRequired.getDefault, subBuilder: TestRequired.create);