Maps type, a structure type of the default namespace, to target in the root's RoleMap.
public void MapRole(CosName type, CosName target)
The type used in the document, such as a custom Para.
The type it maps to, such as P.
ISO 32000-2 Table 354 (RoleMap), §14.7.3: every type of the default namespace is mapped through the role map, even a
standard one. Types of other namespaces map through their namespace (MapRole(CosName, PdfStructureType)). Replaces an
earlier mapping of the type.