text: exports.command = function(callback)
  {
  	this.source(
  		function(result)
  		{
  			if (result.status == 0)
  			{
  				if (typeof callback === "function")
  				{
  					callback(result.value);
  				}
  			}
  			else
  			{
  				if (typeof callback === "function")
  				{
  					callback(result);
  				}
  			}
  		}
  	);
  };
  