def find(pattern)
      patterns= [pattern].flatten
      contents=[]
      self.each_pair do |path, content|
        patterns.each do |pattern|
          contents << content if Content.path_match? path, pattern
        end
      end
      contents
    end
def find(pattern)
      patterns= [pattern].flatten
      contents=[]
      self.each_pair do |path, content|
        patterns.each do |pattern|
          contents << content if Content.path_match? path, pattern
        end
      end
      contents
    end
Scans the filenames (keys) and uses fnmatch to find maches