void predefineClass(String classname) {
		SymbolPath classPath = new SymbolPath(classname);
		namespaceMap.put(classPath, true);
		for (SymbolPath path = classPath.getParent(); path != null; path = path.getParent()) {
			if (!namespaceMap.containsKey(path)) {
				namespaceMap.put(path, false); // path is simple namespace
			}
		}
	}
Apply PDB debug information to the current program

@param log  MessageLog used to record errors
@throws IOException  if an error occurs during parsing
@throws PdbException  if PDB file has already been loaded
@throws CancelledException  if user cancels the current action
Ghidra/Features/PDB/src/main/java/ghidra/app/util/bin/format/pdb/PdbParser.java