Represents the "Resources" entry of the slideshow dictionary object.

It is a required entry defined as part of the PDF 1.4 specification.

It contains a NameTreeNodeElement containing Elements.

For definitive details see:.

The ISO PDF Specification, ISO 32000-1:2008 PDF 1.7; Table: 297, page 510.

The ISO PDF Specification, ISO 32000-2:2017 PDF 2.0; Table: 308, page 637.

The Resources entry references a resource dictionary containing the images and other media objects used in the slideshow. Each resource in the dictionary is a named XObject that can be referenced during the presentation.