code: function(obj, meth){
  			// converts the function to be able to call 
  			// this join
  			var f = convert(obj, meth);
  			if(!f.called){
  				
  				// adds us to the callback ... the callback will call
  				// called
  				f.callbacks.push(this);
  				this.calls++;
  			}
  		}
docs: adds functions that will call this join