add: if ( (x == null) || (y == null) ) { var msg = "You must pass both x and y values to the add function."; OpenLayers.Console.error(msg); return null; } 
context:     add:function(x, y) {        return new OpenLayers.Pixel(this.x + x, this.y + y);    },
meta: 8310	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/8310/9dd9289f88aaa19fa7a64df6c5ca1d51c1669a3c/Pixel.js/clean/lib/OpenLayers/BaseTypes/Pixel.js