Represents the "Vertices" entry of the polygon annotation object.

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

It contains an array which contains doubles, representing PDF numeric objects.

For definitive details see:.

The ISO PDF Specification, ISO 32000-1:2008 PDF 1.7; Table: 178, page 402.

The ISO PDF Specification, ISO 32000-2:2017 PDF 2.0; Table: 181, page 487.

The vertices array holds coordinate pairs in default user space. The viewer connects consecutive pairs with straight segments and closes the shape by connecting the last point back to the first.