filter
Filters out files that should not processed by the task.
The method filters out files that don't belong to the module. A file is considered belonging to the module if it was compiled to JavaScript. A .js file is checked instead of an original .proto file since a module can expose Protobufs defined by other modules and these files still should be handled.
Return
the files to perform the taks for
Parameters
file Set
the files to filter