URI:
  HTML ContinuousReadSupport.html
  HTML DataSourceOptions.html
  HTML DataSourceV2.html
  HTML MicroBatchReadSupport.html
  HTML ReadSupport.html
  HTML ReadSupportWithSchema.html
  HTML SessionConfigSupport.html
  HTML StreamWriteSupport.html
  HTML WriteSupport.html
  HTML package.html
   DIR reader
   DIR writer