docsToInvestigate  
  Indicates the number of documents to preview to determine the document organization. Use this setting when NestingLevel is set to "one".
Must be a positive value greater than 0. Default value is 1000.
Indicates the number of documents to preview to determine the document organization. Use this setting when NestingLevel is set to "one".
Must be a positive value greater than 0. Default value is 1000.