code: public static SetAclContext mergeFrom(SetAclPOptions.Builder optionsBuilder) {
      SetAclPOptions masterOptions = FileSystemOptions.setAclDefaults(ServerConfiguration.global());
      SetAclPOptions.Builder mergedOptionsBuilder =
          masterOptions.toBuilder().mergeFrom(optionsBuilder.build());
      return create(mergedOptionsBuilder);
    }
docs: Merges and embeds the given {@link SetAclPOptions} with the corresponding master options.
  
  @param optionsBuilder Builder for proto {@link SetAclPOptions} to merge with defaults
  @return the instance of {@link SetAclContext} with default values for master