warden-protocol/lib/warden/protocol/pb/error.proto
// This is only a response.
// If an error occurs while executing a request, it is captured and returned as an `ErrorResponse`.
//
// ### Response
//
// * `message`: Error message.
// * `data`: Unused.
// * `backtrace`: Unused.
//
// ### Definition
//
package warden;
message ErrorResponse {
optional string message = 2;
optional string data = 4;
repeated string backtrace = 3;
}