docs: protected synchronized Entry get( DirectoryEntry parent, String name )
      {
          parent.getClass();
          List<Entry> parentEntries = contents.get( parent );
          if ( parentEntries == null )
          {
              return null;
          }
          for ( Entry entry : parentEntries )
          {
              if ( name.equals( entry.getName() ) )
              {
                  return entry;
              }
          }
          return null;
      }