code: public File getFile(VirtualFile mountPoint, VirtualFile target) {
          if (mountPoint.equals(target)) {
              return realRoot;
          } else if (NEEDS_CONVERSION) {
              return new File(realRoot, target.getPathNameRelativeTo(mountPoint).replace('/', File.separatorChar));
          } else {
              return new File(realRoot, target.getPathNameRelativeTo(mountPoint));
          }
      }
docs: {@inheritDoc}