path_name (FastRI::RiIndex::MethodEntry)

    # File lib/fastri/ri_index.rb, line 87
        def path_name
          prefix = @full_name.split(/::|[#.]/)[0..-2]
          case @source_index
          when nil
            ## we'd like to do
            #@ri_index.source_paths_for(self).map do |path|
            #  File.join(File.join(path, *prefix), RI::RiWriter.internal_to_external(@name))
            #end
            # but RI doesn't support merging at the method-level, so
            path = @ri_index.source_paths_for(self).first
            File.join(File.join(path, *prefix),
                      RI::RiWriter.internal_to_external(@name) +
                      (singleton_method? ? "-c" : "-i" ) + ".yaml")
          else
            path = @ri_index.paths[@source_index]
            File.join(File.join(path, *prefix),
                      RI::RiWriter.internal_to_external(@name) +
                      (singleton_method? ? "-c" : "-i" ) + ".yaml")
          end
        end