code: function(chain, recurse) {
      var chainView = new ChainView(this, chain.full());
      this._chains.push(chainView);
      if (recurse) {
        var residues = chain.residues();
        for (var i = 0; i< residues.length; ++i) {
          chainView.addResidue(residues[i], true);
        }
      }
      return chainView;
    }
docs: add chain to view