# File lib/facet/filelist.rb, line 169
  def resolve_add(fn)
    case fn
    when NilClass
      # ignore
    when Array
      fn.each { |f| self.resolve_add(f) }
    when %r{[*?]}
      add_matching(fn)
    else
      self << fn if FileTest.exists?( fn )
    end
  end