code: func NewErrCouldNotUnmarshaTaskSignature(msg []byte, err error) ErrCouldNotUnmarshaTaskSignature {
  	return ErrCouldNotUnmarshaTaskSignature{msg: msg, reason: err.Error()}
  }
docs: // NewErrCouldNotUnmarshaTaskSignature returns new ErrCouldNotUnmarshaTaskSignature instance