External Document

Configures a field to have a file dialog that the user can upload one or more files with
"allowMultiple" can be set to true to allow more than one file to be uploaded to a single field.
Allows all file types to be uploaded.
Value Precision
is AllowMultiple respected?
Has validation?
"fields" : [
"fieldName": "External Doc",
"label": "external_doc",
"required": false,
"maxLength": 10000,
"editable": true,
"dataType": "ExternalDocument",
"allowMultiple": false,
"listOfValues": []