@Override
  public boolean rename(Path src, Path dst) throws IOException {
    Path dest = swizzleParamPath(dst);
    // Make sure for existing destination we return false as per FileSystem api contract
    return super.isFile(dest) ? false : super.rename(swizzleParamPath(src), dest);
  }
Create a proxy file system for fs.

@param fs FileSystem to create proxy for
@param myUri URI to use as proxy. Only the scheme and authority from
             this are used right now
shims/common/src/main/java/org/apache/hadoop/fs/ProxyFileSystem.java