const google.golang.org/protobuf/internal/genid.FieldDescriptorProto_Proto3Optional_field_fullname

one use

	google.golang.org/protobuf/internal/genid (current package)
		descriptor_gen.go#L222: 	FieldDescriptorProto_Proto3Optional_field_fullname protoreflect.FullName = "google.protobuf.FieldDescriptorProto.proto3_optional"