code: public static FsPermission deserializeWriterFilePermissions(State state, int numBranches, int branchId) {
      return new FsPermission(state.getPropAsShortWithRadix(
          ForkOperatorUtils.getPropertyNameForBranch(ConfigurationKeys.WRITER_FILE_PERMISSIONS, numBranches, branchId),
          FsPermission.getDefault().toShort(), ConfigurationKeys.PERMISSION_PARSING_RADIX));
    }
docs: Deserializes a {@link FsPermission}s object that should be used when a {@link DataWriter} is writing a file.