"Loop Files output"

Hello

I would like to get an output from File Loop operator, just like every other Loop operator provides. I need to perform some logic over every file in directory, create result object, collect all result objects using Collector operator and then forward it to the Loop File operator output. I don't really understand why Loop File doesn't have output port.
Is there a simple way how to solve this? If no, could I write my own Loop File operator, oveloading yours?
Thank you