    # File lib/facets/more/dependency.rb, line 68
      def depend( name_and_deps=nil )
        if Hash === name_and_deps
          name_and_deps.to_h.each do |name, deps|
            deps = [deps].flatten
            define_dependency(name, *deps)
          end
        elsif name_and_deps
          @dependency ||= {}
          @dependency[name_and_deps.to_sym]
        else
          @dependency ||= {}
        end
      end