docs: function (subpath) {
      if (!this._sharedInternals.metaBinding) {
        var metaBinding = Binding.init(Imm.Map());
        linkMeta(this, metaBinding);
        this._sharedInternals.metaBinding = metaBinding;
      }
  
      var effectiveSubpath = subpath ? Util.joinPaths([Util.META_NODE], asArrayPath(subpath)) : [Util.META_NODE];
      var thisPath = this.getPath();
      var absolutePath = thisPath.length > 0 ? Util.joinPaths(thisPath, effectiveSubpath) : effectiveSubpath;
      return this._sharedInternals.metaBinding.sub(absolutePath);
    }