Represents the "Count" entry of the outline item dictionary object.

It is 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: 153, page 368.

The ISO PDF Specification, ISO 32000-2:2017 PDF 2.0; Table: 151, page 443.

A positive value means the item is expanded; negative means collapsed. The absolute value gives the total open descendant count, allowing the open state to be restored when the item is expanded.