def parse_filter(filter_argument = nil, &filter_proc)
      filter = filter_argument || filter_proc

      if filter
        SimpleCov::Filter.build_filter(filter)
      else
        raise ArgumentError, "Please specify either a filter or a block to filter with"
      end
    end
def parse_filter(filter_argument = nil, &filter_proc)
      filter = filter_argument || filter_proc

      if filter
        SimpleCov::Filter.build_filter(filter)
      else
        raise ArgumentError, "Please specify either a filter or a block to filter with"
      end
    end
The actual filter processor. Not meant for direct use