code: func (k *Key) ParamHash() []byte {
  	cstr := ""
  	if k.Content {
  		cstr = "y"
  	}
  	return HashParams(k.Schema, k.ServiceURL, string(k.Authority), string(k.Op), cstr,
  		k.Formatter, k.FormatData, string(k.ConfigSet), k.Path, string(k.GetAllTarget))
  }
docs: // ParamHash returns a deterministic hash of all of the key parameters.