question: private File copyToMergedCodebase ( String filename , File destFile ) { File mergedFile = mergedCodebase . getFile ( filename ) ; try { filesystem . makeDirsForFile ( mergedFile ) ; filesystem . copyFile ( destFile , mergedFile ) ; return mergedFile ; } catch ( IOException e ) { throw new MoeProblem ( e . getMessage ( ) ) ; } }
target:  Copy the destFile into the merged codebase. This is where the output of merge will be written to.