Represents the "D" entry of the box style dictionary object.

It is an optional entry defined as part of the PDF 1.0 specification.

It contains an array which contains Elements.

For definitive details see:.

The ISO PDF Specification, ISO 32000-1:2008 PDF 1.7; Table: 361, page 631.

The ISO PDF Specification, ISO 32000-2:2017 PDF 2.0; Table: 397, page 811.