code: function(config) {
          config = config || {};
          OpenLayers.Layer.Vector.prototype.initialize.apply(this, [config.name, config]);
      }
docs: Constructor: OpenLayers.Layer.PointGrid
  Creates a new point grid layer.
  
  Parameters:
  config - {Object} An object containing all configuration properties for
  the layer.  The <dx> and <dy> properties are required to be set at
  construction.  Any other layer properties may be set in this object.