def line_parse(validated_line)
      return unless validated_line
      row = validated_line.split(',')
      return unless row.any?
      if @headers.empty?
        @headers = row
      else
        @data_hash.merge!(row_to_hsh(row))
        @valid_rows << @data_hash
      end
    end
def line_parse(validated_line)
      return unless validated_line
      row = validated_line.split(',')
      return unless row.any?
      if @headers.empty?
        @headers = row
      else
        @data_hash.merge!(row_to_hsh(row))
        @valid_rows << @data_hash
      end
    end
line_parse - helper VALIDATE HASHES 
 Parses line to row, then updates final results.