rem: if (batch && batch.metadata && !batch.completed) { DWREngine._clearUp(); 
add: if (batch && batch.metadata != null && !batch.completed) { DWREngine._clearUp(batch); 
context: DWREngine._abortRequest = function(batch) {  if (batch && batch.metadata && !batch.completed) {    DWREngine._clearUp();    if (batch.req) batch.req.abort();  }};
meta: 266	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/266/ed558c2162d130689f40337cfdbe8b9f6fbe8d58/engine.js/clean/java/uk/ltd/getahead/dwr/engine.js