Add a more detailed comment about merging fetch results
Add a more detailed comment about merging fetch results

manuyavuz/ios-library,mikerowan/ios-library,manuyavuz/ios-library,zhangqinghe/ios-library,mikerowan/ios-library,grosch/ios-library,grosch/ios-library,zhangqinghe/ios-library,zhangqinghe/ios-library,grosch/ios-library,manuyavuz/ios-library,ipmobiletech/ios-library,ipmobiletech/ios-library,ipmobiletech/ios-library,mikerowan/ios-library