lib/red_amber.rb in red_amber-0.2.2 vs lib/red_amber.rb in red_amber-0.2.3

@@ -1,9 +1,10 @@
 # frozen_string_literal: true
 
 require 'arrow'
 
 require_relative 'red_amber/helper'
+require_relative 'red_amber/data_frame_combinable'
 require_relative 'red_amber/data_frame_displayable'
 require_relative 'red_amber/data_frame_indexable'
 require_relative 'red_amber/data_frame_loadsave'
 require_relative 'red_amber/data_frame_reshaping'
 require_relative 'red_amber/data_frame_selectable'