create_composition_map

# File activesupport/bin/generate_tables, line 91
        def create_composition_map
          @ucd.codepoints.each do |_, cp|
            if !cp.nil? and cp.combining_class == 0 and cp.decomp_type.nil? and !cp.decomp_mapping.nil? and cp.decomp_mapping.length == 2 and @ucd.codepoints[cp.decomp_mapping[0]].combining_class == 0 and [email protected]_exclusion.include?(cp.code)
              @ucd.composition_map[cp.decomp_mapping[0]] ||= {}
              @ucd.composition_map[cp.decomp_mapping[0]][cp.decomp_mapping[1]] = cp.code
            end
          end
        end