Gets or sets a value indicating whether a document that already has a structure tree is tagged again. Default
false: such a document is left alone.
public bool Force { get; set; }
ISO 32000-2 §14.7.2. When forced, the old structure tree is detached from the catalog (with the pages', their annotations'
and their XObjects' parent-tree keys), the page-level marked-content sequences that carried an MCID lose it (they become
BMC with the same tag), and every page is laid out from its geometry.