def init_key_columns(key_scheme)

        @key_titles  = []
        @key_columns = []

        keys = key_scheme.scan(/(\d+):(\w+)/)

        keys.each do |key|
          @key_titles  << key[1]
          @key_columns << key[0].to_i
        end

      end
def init_key_columns(key_scheme)

        @key_titles  = []
        @key_columns = []

        keys = key_scheme.scan(/(\d+):(\w+)/)

        keys.each do |key|
          @key_titles  << key[1]
          @key_columns << key[0].to_i
        end

      end
Initialize the key columns and headers