docs: function( _children ){
      var self = this;
  
      for( var k in _children ){
        if( !_children.hasOwnProperty( k ) ) continue;
        var child = _children[ k ];
        if( Array.isArray( child ) ){
          for( var i = 0, l = child.length; i < l; i++ ){
            self._deleteUcFields( child[ i ] );
            delete child[ i ]._clean;
          }
        } else {
          self._deleteUcFields( child );
          delete child._clean;
        }
      }
    }