public static boolean closeAllPdbs(GhidraScript script) {
		boolean allUnloaded = true;
		Iterator<Entry<String, PdbInfo>> iterator = pdbInfoByFile.entrySet().iterator();
		while (iterator.hasNext()) {
			Entry<String, PdbInfo> entry = iterator.next();
			String filename = entry.getKey();
			boolean success = closePdbInternal(script, filename);
			if (success) {
				iterator.remove();
			}
			allUnloaded &= success;
		}
		return allUnloaded;
	}
Closes and unloads the PDB file from the map.  Not removed from map if IOException.
@param script script for which we are working
@return true if all PDBs were successfully closed and unloaded from the map
Ghidra/Features/PDB/developer_scripts/pdbquery/PdbFactory.java