Represents the "Size" entry of the cross-reference stream dictionary object.

It is a required entry defined as part of the PDF 1.0 specification.

It contains an integer representing a PDF numeric object.

For definitive details see:.

The ISO PDF Specification, ISO 32000-1:2008 PDF 1.7; Table: 17, page 50.

The ISO PDF Specification, ISO 32000-2:2017 PDF 2.0; Table: 17, page 65.

The Size entry in the cross-reference stream has the same meaning as in the traditional trailer: it gives the total number of cross-reference entries across all revisions, one greater than the highest object number in use.