The prefix for the names of config fields in requests.
The prefix for the names of config fields in requests.
If a field has a name that starts with this prefix, the prefix must be followed by a control's UniqueID. The contents of the field must have been returned by a previous call to Protect. The module will pass the field contents to Unprotect of an object returned by CreateUploadStorageConfig and will be used in an implementation dependent way when processing the file fields for the same control UniqueID.